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Unit 7 - Lesson 13 - Grade 2: Illustrative Mathematics

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12 Questions
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Grade 2 Unit 7
Lesson 13: Decompose Tens or Hundreds
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 13: Decompose Tens or Hundreds
CC BY 2021 Illustrative Mathematics®
Lesson: Decompose Tens or Hundreds

Which One Doesn’t Belong: Blocks and Blocks (Warm Up)

1.

Which one doesn’t belong?

Subtract with Base-ten Diagrams

Mai used base-ten blocks to find the value of 336 - 52. Then, she started making a diagram to show her work.

2.

Explain what Mai did in Step 2.

Show what Mai should do next to find the difference.

3.

Write each expression next to the matching diagram.

4.

Find the value of the difference.

244 - 28

5.

Find the value of the difference.

256 - 64

6.

Find the value of the difference.

244 - 64

Decompose a Ten or Hundred

Find the value of each difference. Show your thinking. Try Mai's way for one expression.
7.

245 - 28

8.

352 - 71

9.

364 - 182

10.

293 - 147

11.

Share how you found the value of one of the expressions to your partner. Use the sentence frames to help explain:
  • “First, I . . .”
  • “Next, I . . .”
  • “Then, I . . .”
  • “Last , I . . .”

Cool Down: More Subtraction
12.

Find the value of 519 - 236. Show your thinking.