Chapter 58: Calendars and Time Language
Learn Grade 1 mathematics from very beginner explanations through worked examples, practice, reasoning, and review.
Chapter Overview
This chapter teaches Calendars and Time Language with simple language, step-by-step reasoning, and original worked examples. Math words are explained in simple Grade 1 language.
Key Technical Terms
- Days of the week (a Grade 1 idea used in this chapter)
- Months of the year (a Grade 1 idea used in this chapter)
- Today yesterday and tomorrow (a Grade 1 idea used in this chapter)
- Weekdays and weekends (a Grade 1 idea used in this chapter)
- Reading a simple calendar (a Grade 1 idea used in this chapter)
- Finding a date (a Grade 1 idea used in this chapter)
- Counting days on a calendar (a Grade 1 idea used in this chapter)
- Events before and after (a Grade 1 idea used in this chapter)
- Morning afternoon and evening (a Grade 1 idea used in this chapter)
- Calendar review (a Grade 1 idea used in this chapter)
How to Learn This Chapter
Read or listen to the explanation, use objects or pictures when helpful, follow one step at a time, and try the example again before checking the answer.
58.1 Days of the week
Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Days of the week mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Days of the week.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Days of the week.
Worked Example 3
Problem: Which tool could help with Days of the week?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Days of the week?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Days of the week in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Days of the week can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Days of the week. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.2 Months of the year
Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Months of the year mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Months of the year.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Months of the year.
Worked Example 3
Problem: Which tool could help with Months of the year?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Months of the year?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Months of the year in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Months of the year can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Months of the year. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.3 Today yesterday and tomorrow
Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Today yesterday and tomorrow mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Today yesterday and tomorrow.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Today yesterday and tomorrow.
Worked Example 3
Problem: Which tool could help with Today yesterday and tomorrow?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Today yesterday and tomorrow?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Today yesterday and tomorrow in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Today yesterday and tomorrow can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Today yesterday and tomorrow. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.4 Weekdays and weekends
Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Weekdays and weekends mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Weekdays and weekends.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Weekdays and weekends.
Worked Example 3
Problem: Which tool could help with Weekdays and weekends?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Weekdays and weekends?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Weekdays and weekends in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Weekdays and weekends can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Weekdays and weekends. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.5 Reading a simple calendar
Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Reading a simple calendar mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Worked Example 2
Problem: Show one small example of Reading a simple calendar.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: A correct small model or drawing can show the meaning of Reading a simple calendar.
Worked Example 3
Problem: Which tool could help with Reading a simple calendar?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Reading a simple calendar?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Reading a simple calendar in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Reading a simple calendar can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Reading a simple calendar. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.6 Finding a date
Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Finding a date mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Finding a date.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Finding a date.
Worked Example 3
Problem: Which tool could help with Finding a date?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Finding a date?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Finding a date in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Finding a date can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: Show Finding a date with a simple Grade 1 example.
- Use small numbers, objects, or a drawing.
- Explain what the example shows.
Very beginner explanation: Grade 1 learners understand Finding a date best through concrete examples and clear words.
Answer: A correct simple example of Finding a date.
Worked Example 7
Problem: Show Finding a date with a simple Grade 1 example.
- Use small numbers, objects, or a drawing.
- Explain what the example shows.
Very beginner explanation: Grade 1 learners understand Finding a date best through concrete examples and clear words.
Answer: A correct simple example of Finding a date.
Worked Example 8
Problem: Show Finding a date with a simple Grade 1 example.
- Use small numbers, objects, or a drawing.
- Explain what the example shows.
Very beginner explanation: Grade 1 learners understand Finding a date best through concrete examples and clear words.
Answer: A correct simple example of Finding a date.
Worked Example 9
Problem: Show Finding a date with a simple Grade 1 example.
- Use small numbers, objects, or a drawing.
- Explain what the example shows.
Very beginner explanation: Grade 1 learners understand Finding a date best through concrete examples and clear words.
Answer: A correct simple example of Finding a date.
Worked Example 10
Problem: Show Finding a date with a simple Grade 1 example.
- Use small numbers, objects, or a drawing.
- Explain what the example shows.
Very beginner explanation: Grade 1 learners understand Finding a date best through concrete examples and clear words.
Answer: A correct simple example of Finding a date.
Practice Exercise
Create one small question about Finding a date. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.7 Counting days on a calendar
Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Counting days on a calendar mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Answer: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Worked Example 2
Problem: Show one small example of Counting days on a calendar.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Answer: A correct small model or drawing can show the meaning of Counting days on a calendar.
Worked Example 3
Problem: Which tool could help with Counting days on a calendar?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Counting days on a calendar?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Counting days on a calendar in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Answer: Counting days on a calendar can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: Count to 6. What number comes just before 6?
- Count forward until 6.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 5
Worked Example 7
Problem: Count to 12. What number comes just before 12?
- Count forward until 12.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 11
Worked Example 8
Problem: Count to 19. What number comes just before 19?
- Count forward until 19.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 18
Worked Example 9
Problem: Count to 27. What number comes just before 27?
- Count forward until 27.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 26
Worked Example 10
Problem: Count to 44. What number comes just before 44?
- Count forward until 44.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 43
Practice Exercise
Create one small question about Counting days on a calendar. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.8 Events before and after
Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Events before and after mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Events before and after.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Events before and after.
Worked Example 3
Problem: Which tool could help with Events before and after?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Events before and after?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Events before and after in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Events before and after can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: Count to 6. What number comes just before 6?
- Count forward until 6.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 5
Worked Example 7
Problem: Count to 12. What number comes just before 12?
- Count forward until 12.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 11
Worked Example 8
Problem: Count to 19. What number comes just before 19?
- Count forward until 19.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 18
Worked Example 9
Problem: Count to 27. What number comes just before 27?
- Count forward until 27.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 26
Worked Example 10
Problem: Count to 44. What number comes just before 44?
- Count forward until 44.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 43
Practice Exercise
Create one small question about Events before and after. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.9 Morning afternoon and evening
Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Morning afternoon and evening mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Worked Example 2
Problem: Show one small example of Morning afternoon and evening.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: A correct small model or drawing can show the meaning of Morning afternoon and evening.
Worked Example 3
Problem: Which tool could help with Morning afternoon and evening?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Morning afternoon and evening?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Morning afternoon and evening in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Answer: Morning afternoon and evening can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: Count to 6. What number comes just before 6?
- Count forward until 6.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 5
Worked Example 7
Problem: Count to 12. What number comes just before 12?
- Count forward until 12.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 11
Worked Example 8
Problem: Count to 19. What number comes just before 19?
- Count forward until 19.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 18
Worked Example 9
Problem: Count to 27. What number comes just before 27?
- Count forward until 27.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 26
Worked Example 10
Problem: Count to 44. What number comes just before 44?
- Count forward until 44.
- Move back one number.
Very beginner explanation: The number before is one less.
Answer: 43
Practice Exercise
Create one small question about Morning afternoon and evening. Show it with objects, a picture, or numbers, then check by counting or comparing again.
58.10 Calendar review
Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Beginner Note
Start with real objects, fingers, or a picture. Say the idea aloud, try one small example, and check it by counting or comparing again.
10 Worked Examples with Answers and Very-Beginner Explanations
Worked Example 1
Problem: What does Calendar review mean?
- Say the topic in simple words.
- Use objects, fingers, a drawing, or a number example.
- Tell what you notice.
Very beginner explanation: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Worked Example 2
Problem: Show one small example of Calendar review.
- Choose small numbers or a simple shape/object.
- Make a model or drawing.
- Describe what the model shows.
Very beginner explanation: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: A correct small model or drawing can show the meaning of Calendar review.
Worked Example 3
Problem: Which tool could help with Calendar review?
- Think about counters, fingers, a ten frame, number line, picture, table, or real object.
- Choose the tool that makes the idea easiest to see.
Very beginner explanation: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Use a simple tool that lets you see and check the quantities or shapes.
Worked Example 4
Problem: How can you check your work in Calendar review?
- Look at the objects, drawing, or numbers again.
- Count or compare one more time.
- Make sure the answer matches the question.
Very beginner explanation: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Check by recounting, comparing, or using a second simple model.
Worked Example 5
Problem: Where might you use Calendar review in everyday life?
- Think about toys, snacks, books, classroom objects, calendars, shapes, or money.
- Choose one situation.
- Explain how the math helps.
Very beginner explanation: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Answer: Calendar review can help with a simple everyday task such as counting, sharing, comparing, measuring, organizing, or deciding.
Worked Example 6
Problem: If today is Monday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Tuesday
Worked Example 7
Problem: If today is Tuesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Wednesday
Worked Example 8
Problem: If today is Wednesday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Thursday
Worked Example 9
Problem: If today is Thursday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Friday
Worked Example 10
Problem: If today is Friday, what day is tomorrow?
- Move one day forward in the week.
Very beginner explanation: Tomorrow is the next day on the weekly cycle.
Answer: Saturday
Practice Exercise
Create one small question about Calendar review. Show it with objects, a picture, or numbers, then check by counting or comparing again.
Chapter Notes, Practice, and Common Mistakes
Chapter Notes
- Read or listen to the question before solving.
- Use objects, a drawing, ten frame, number line, table, graph, or simple number sentence when useful.
- Explain your thinking and check by counting, comparing, or using another simple model.
Extra Practice
- Create and solve one original problem about Days of the week.
- Create and solve one original problem about Months of the year.
- Create and solve one original problem about Today yesterday and tomorrow.
- Create and solve one original problem about Weekdays and weekends.
- Create and solve one original problem about Reading a simple calendar.
- Create and solve one original problem about Finding a date.
Common Mistakes
- Skipping the meaning and trying to memorize a rule only.
- Using the wrong operation because the question was not read completely.
- Ignoring units, labels, place values, or the context of the problem.
- Not estimating or checking whether the final answer is reasonable.
30 Review Questions and Answers
Q1. What is the main idea in Days of the week?
Answer: Days of the week is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q2. What is the main idea in Months of the year?
Answer: Months of the year is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q3. What is the main idea in Today yesterday and tomorrow?
Answer: Today yesterday and tomorrow is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q4. What is the main idea in Weekdays and weekends?
Answer: Weekdays and weekends is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q5. What is the main idea in Reading a simple calendar?
Answer: Reading a simple calendar helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Q6. What is the main idea in Finding a date?
Answer: Finding a date is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q7. What is the main idea in Counting days on a calendar?
Answer: Counting days on a calendar helps Grade 1 learners build strong number sense with small numbers, objects, drawings, and number lines.
Q8. What is the main idea in Events before and after?
Answer: Events before and after is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q9. What is the main idea in Morning afternoon and evening?
Answer: Morning afternoon and evening is a Grade 1 mathematics idea. Learn it with objects or pictures first, then explain it with numbers or words.
Q10. What is the main idea in Calendar review?
Answer: Calendar review helps learners compare and describe everyday measurements or time using clear Grade 1 language and hands-on examples.
Q11. Why is it useful to use counters or drawings?
Answer: They make the quantities visible and help you understand before using only numbers.
Q12. Why should you count carefully?
Answer: Careful counting means each object is counted once and no object is missed.
Q13. What can you do if a problem feels hard?
Answer: Use smaller numbers, draw a picture, use objects, and solve one small step at a time.
Q14. Why should both sides of an equals sign match?
Answer: The equals sign means the two sides have the same value.
Q15. How can a number line help?
Answer: It shows number order and can help you count forward or backward.
Q16. How can a ten frame help?
Answer: It organizes objects into groups that make numbers and addition easier to see.
Q17. Why are equal shares important?
Answer: Equal shares make fair groups or equal parts.
Q18. How do patterns help us predict?
Answer: A pattern rule tells us what should come next.
Q19. Why do we label a graph or table?
Answer: Labels tell us what the information represents.
Q20. How can you describe a shape?
Answer: Talk about its sides, corners, flat or curved surfaces, and other visible attributes.
Q21. How can you compare two objects?
Answer: Choose one attribute, such as length, mass, or capacity, and compare that same attribute.
Q22. Why is a calendar useful?
Answer: It organizes days, weeks, months, dates, and events.
Q23. Why does money have different values?
Answer: Different coins and bills represent different amounts of money.
Q24. Why should you explain your answer?
Answer: Explaining shows how you thought about the problem and helps you check your reasoning.
Q25. What should you do after a mistake?
Answer: Look at the step again, fix it, and try a similar example.
Q26. How can you be a confident math learner?
Answer: Use positive self-talk, try a strategy, ask questions, and remember that mistakes help you learn.
Q27. When should you use a picture?
Answer: Use a picture when it helps you see quantities, shapes, positions, or a story problem.
Q28. When should you use objects?
Answer: Use objects when you want to count, join, take away, share, sort, or compare in a hands-on way.
Q29. How can you check addition?
Answer: Recount the combined objects or use another model.
Q30. How can you check subtraction?
Answer: Put the taken-away part and the part left back together to see if they make the starting amount.