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K-5 Grade 2 Unit 7 Lesson 12

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Lesson 12

Warm-up Activity 1 Activity 2

Unit 7, Lesson 12

Decompose to Subtract

Grade 2

Warm-up

What do you know about 354?

How can you represent the number 354?

Activity 1

Find the value of each expression in any way that makes sense to you. Explain your reasoning.

Activity 2

Work with your partner. Find the value of each expression.

Partner A: Read the expression. Represent the greater number, using blocks.
Partner B: Decide if you need to decompose a ten. Then subtract.
Discuss. Then write the difference.
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