Grade 2 Unit 9
Lesson 5: Compose and Decompose Numbers Within 1,000
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 9
Lesson 5: Compose and Decompose Numbers Within 1,000
CC BY 2021 Illustrative Mathematics®
What do you know about 308?
Start with 2 hundreds. Grab a handful of tens and of ones.
What number do your base-ten blocks represent?
Represent the same number in another way. Show your thinking using diagrams, symbols, or other representations.
Combine your blocks with your partner’s blocks.
What number do your base-ten blocks represent?
Represent the same number in another way. Show your thinking using diagrams, symbols, or
other representations.
Represent your group’s number without hundred.
Represent your group’s number without tens.
Represent your group’s number without hundred or tens.
Represent 356 in at least 3 different ways. Show your thinking using diagrams, symbols, or other representations.
Create a poster with your group to show 356 in different ways.
Circle the representations that show 263.
Represent 263 in a different way.