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Chapter 49: Three-Dimensional Objects

Learn Grade 2 mathematics with very-beginner explanations, original worked examples, practice, reasoning, and review.

Grade 2Very Beginner Friendly10 Examples Per Topic30 Q&APractice + Review
Estimated reading time0% read
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Chapter Overview

This chapter teaches Three-Dimensional Objects with simple explanations, visual thinking, worked examples, practice, and review.

49.1 Cubes

Spatial sense describes shapes and objects using their attributes, parts, positions, and different views. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 11 and 1 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 2

Problem: Use 12 and 9 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 3

Problem: Use 18 and 13 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 4

Problem: Use 6 and 4 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 5

Problem: Use 8 and 3 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 6

Problem: Use 20 and 12 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 7

Problem: Use 2 and 9 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 8

Problem: Use 17 and 2 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 9

Problem: Use 7 and 4 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

Worked Example 10

Problem: Use 14 and 15 to make a simple example about Cubes.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cubes.

49.2 Rectangular prisms

Spatial sense describes shapes and objects using their attributes, parts, positions, and different views. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 9 and 20 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 2

Problem: Use 6 and 8 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 3

Problem: Use 17 and 19 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 4

Problem: Use 18 and 17 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 5

Problem: Use 18 and 19 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 6

Problem: Use 9 and 16 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 7

Problem: Use 7 and 8 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 8

Problem: Use 10 and 12 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 9

Problem: Use 7 and 9 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

Worked Example 10

Problem: Use 11 and 5 to make a simple example about Rectangular prisms.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Rectangular prisms.

49.3 Cylinders

Spatial sense describes shapes and objects using their attributes, parts, positions, and different views. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 20 and 7 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 2

Problem: Use 20 and 4 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 3

Problem: Use 3 and 12 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 4

Problem: Use 14 and 8 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 5

Problem: Use 16 and 6 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 6

Problem: Use 5 and 2 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 7

Problem: Use 1 and 18 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 8

Problem: Use 2 and 13 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 9

Problem: Use 11 and 19 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

Worked Example 10

Problem: Use 5 and 4 to make a simple example about Cylinders.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Cylinders.

49.4 Cones

Place value tells how much a digit is worth because of its position in a number. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: How many hundreds, tens, and ones are in 126?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 2 tens, 6 ones

Worked Example 2

Problem: How many hundreds, tens, and ones are in 172?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 7 tens, 2 ones

Worked Example 3

Problem: How many hundreds, tens, and ones are in 107?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 0 tens, 7 ones

Worked Example 4

Problem: How many hundreds, tens, and ones are in 121?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 2 tens, 1 ones

Worked Example 5

Problem: How many hundreds, tens, and ones are in 144?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 4 tens, 4 ones

Worked Example 6

Problem: How many hundreds, tens, and ones are in 125?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 2 tens, 5 ones

Worked Example 7

Problem: How many hundreds, tens, and ones are in 199?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 9 tens, 9 ones

Worked Example 8

Problem: How many hundreds, tens, and ones are in 189?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 8 tens, 9 ones

Worked Example 9

Problem: How many hundreds, tens, and ones are in 171?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 7 tens, 1 ones

Worked Example 10

Problem: How many hundreds, tens, and ones are in 148?

  1. Read the hundreds digit.
  2. Read the tens digit.
  3. Read the ones digit.

Very beginner explanation: Position tells place value.

Answer: 1 hundred, 4 tens, 8 ones

49.5 Spheres

Spatial sense describes shapes and objects using their attributes, parts, positions, and different views. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 12 and 13 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 2

Problem: Use 16 and 13 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 3

Problem: Use 8 and 5 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 4

Problem: Use 2 and 3 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 5

Problem: Use 12 and 11 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 6

Problem: Use 5 and 11 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 7

Problem: Use 15 and 19 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 8

Problem: Use 18 and 8 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 9

Problem: Use 4 and 3 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

Worked Example 10

Problem: Use 20 and 11 to make a simple example about Spheres.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Spheres.

49.6 Faces

Faces is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 11 and 16 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 2

Problem: Use 18 and 18 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 3

Problem: Use 1 and 15 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 4

Problem: Use 18 and 12 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 5

Problem: Use 20 and 1 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 6

Problem: Use 5 and 19 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 7

Problem: Use 6 and 13 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 8

Problem: Use 4 and 16 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 9

Problem: Use 6 and 19 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

Worked Example 10

Problem: Use 14 and 10 to make a simple example about Faces.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Faces.

49.7 Edges

Edges is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 15 and 4 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 2

Problem: Use 12 and 12 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 3

Problem: Use 9 and 18 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 4

Problem: Use 5 and 17 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 5

Problem: Use 20 and 17 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 6

Problem: Use 6 and 19 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 7

Problem: Use 11 and 15 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 8

Problem: Use 3 and 2 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 9

Problem: Use 17 and 3 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

Worked Example 10

Problem: Use 10 and 6 to make a simple example about Edges.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Edges.

49.8 Vertices

Vertices is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 2 and 7 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 2

Problem: Use 14 and 6 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 3

Problem: Use 11 and 2 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 4

Problem: Use 12 and 18 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 5

Problem: Use 5 and 8 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 6

Problem: Use 16 and 14 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 7

Problem: Use 6 and 8 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 8

Problem: Use 16 and 2 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 9

Problem: Use 10 and 4 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

Worked Example 10

Problem: Use 1 and 10 to make a simple example about Vertices.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Vertices.

49.9 Sorting 3D objects

Sorting 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 13 and 16 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 2

Problem: Use 19 and 9 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 3

Problem: Use 3 and 6 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 4

Problem: Use 1 and 1 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 5

Problem: Use 7 and 8 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 6

Problem: Use 9 and 19 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 7

Problem: Use 6 and 17 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 8

Problem: Use 11 and 5 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 9

Problem: Use 10 and 7 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

Worked Example 10

Problem: Use 5 and 4 to make a simple example about Sorting 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Sorting 3D objects.

49.10 Building with 3D objects

Building with 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 5 and 15 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 2

Problem: Use 12 and 11 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 3

Problem: Use 16 and 4 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 4

Problem: Use 12 and 1 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 5

Problem: Use 14 and 12 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 6

Problem: Use 1 and 18 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 7

Problem: Use 3 and 17 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 8

Problem: Use 6 and 14 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 9

Problem: Use 15 and 4 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

Worked Example 10

Problem: Use 6 and 12 to make a simple example about Building with 3D objects.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Building with 3D objects.

49.11 Recognizing objects from different views

Recognizing objects from different views is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 1 and 13 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 2

Problem: Use 18 and 19 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 3

Problem: Use 7 and 17 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 4

Problem: Use 7 and 20 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 5

Problem: Use 11 and 4 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 6

Problem: Use 20 and 16 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 7

Problem: Use 9 and 14 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 8

Problem: Use 17 and 13 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 9

Problem: Use 9 and 11 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

Worked Example 10

Problem: Use 12 and 2 to make a simple example about Recognizing objects from different views.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Recognizing objects from different views.

49.12 Describing a 3D object

Describing a 3D object is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words. Use objects, drawings, number lines, tables, or number sentences when useful.

10 Worked Examples with Answers

Worked Example 1

Problem: Use 2 and 10 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 2

Problem: Use 9 and 15 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 3

Problem: Use 9 and 5 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 4

Problem: Use 10 and 11 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 5

Problem: Use 4 and 9 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 6

Problem: Use 19 and 16 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 7

Problem: Use 15 and 14 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 8

Problem: Use 11 and 8 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 9

Problem: Use 4 and 20 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

Worked Example 10

Problem: Use 12 and 5 to make a simple example about Describing a 3D object.

  1. Recall the topic meaning.
  2. Use objects, a drawing, or a number sentence.
  3. Check that the example matches the idea.

Very beginner explanation: Simple models make Grade 2 ideas easier to understand.

Answer: A correct Grade 2 example of Describing a 3D object.

30 Review Questions and Answers

Q1. What should a Grade 2 learner understand about Cubes?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q2. What should a Grade 2 learner understand about Rectangular prisms?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q3. What should a Grade 2 learner understand about Cylinders?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q4. What should a Grade 2 learner understand about Cones?

Answer: Place value tells how much a digit is worth because of its position in a number.

Q5. What should a Grade 2 learner understand about Spheres?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q6. What should a Grade 2 learner understand about Faces?

Answer: Faces is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q7. What should a Grade 2 learner understand about Edges?

Answer: Edges is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q8. What should a Grade 2 learner understand about Vertices?

Answer: Vertices is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q9. What should a Grade 2 learner understand about Sorting 3D objects?

Answer: Sorting 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q10. What should a Grade 2 learner understand about Building with 3D objects?

Answer: Building with 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q11. What should a Grade 2 learner understand about Recognizing objects from different views?

Answer: Recognizing objects from different views is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q12. What should a Grade 2 learner understand about Describing a 3D object?

Answer: Describing a 3D object is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q13. What should a Grade 2 learner understand about Cubes?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q14. What should a Grade 2 learner understand about Rectangular prisms?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q15. What should a Grade 2 learner understand about Cylinders?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q16. What should a Grade 2 learner understand about Cones?

Answer: Place value tells how much a digit is worth because of its position in a number.

Q17. What should a Grade 2 learner understand about Spheres?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q18. What should a Grade 2 learner understand about Faces?

Answer: Faces is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q19. What should a Grade 2 learner understand about Edges?

Answer: Edges is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q20. What should a Grade 2 learner understand about Vertices?

Answer: Vertices is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q21. What should a Grade 2 learner understand about Sorting 3D objects?

Answer: Sorting 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q22. What should a Grade 2 learner understand about Building with 3D objects?

Answer: Building with 3D objects is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q23. What should a Grade 2 learner understand about Recognizing objects from different views?

Answer: Recognizing objects from different views is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q24. What should a Grade 2 learner understand about Describing a 3D object?

Answer: Describing a 3D object is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.

Q25. What should a Grade 2 learner understand about Cubes?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q26. What should a Grade 2 learner understand about Rectangular prisms?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q27. What should a Grade 2 learner understand about Cylinders?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q28. What should a Grade 2 learner understand about Cones?

Answer: Place value tells how much a digit is worth because of its position in a number.

Q29. What should a Grade 2 learner understand about Spheres?

Answer: Spatial sense describes shapes and objects using their attributes, parts, positions, and different views.

Q30. What should a Grade 2 learner understand about Faces?

Answer: Faces is a Grade 2 math idea best learned with simple numbers, objects, drawings, and clear words.