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About the Mathematics in This Unit

Benchmarks Examples
Understand that 100 can be seen as 1 hundred, 10 tens, and 100 ones. A sticker sheet.

100 single stickers

10 strips of 10

1 sheet of 100

Understand that multiples of 100 (e.g., 200, 300, 400, etc.) are made up of a number (2, 3, 4, etc.) of hundreds.

300 = 3 groups of 100

Three sticker sheets.

“100, 200, 300”

Solve story problems with an unknown change.

Kira had 15 balloons. Her dad gave her some more. Then she had 20. How many did her dad give her?

Sally had 15 balloons. She gave some to her mom. Then she had 10. How many did she give to her mom?

Solve story problems with an unknown start.

Kira had some balloons. Her dad gave her 5 more. Then she had 35. How many did Kira start with?

Sally had some balloons. She gave 10 to her mom. Then she had 24. How many did Sally have at the beginning?

In our math class, students continue to engage in math problems and activities and share how they solve a given problem. Most importantly, children accurately solve math problems in ways that make sense to them. At home, encourage your child to explain his or her math thinking to you. In the coming weeks, you will receive suggestions for activities to do at home that further support the mathematics in this unit.


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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Coins, Number Strings, and Story Problems Unit 2 Attributes of Shapes and Parts of a Whole Unit 3 How Many Stickers? How Many Cents? Unit 4 Pockets, Teeth, and Guess My Rule Unit 5 How Many Tens? How Many Hundreds? Unit 6 How Far Can You Jump? Unit 7 Partners, Teams, and Other Groups Unit 8 Enough for the Class? Enough for the Grade?