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®
Which one doesn’t belong?
Mai used base-ten blocks to find the value of 336 - 52. Then, she started making a diagram to show her work.
Explain what Mai did in Step 2.
Show what Mai should do next to find the difference.
Write each expression next to the matching diagram.
Find the value of the difference.
244 - 28
Find the value of the difference.
256 - 64
Find the value of the difference.
244 - 64
Find the value of each difference. Show your thinking. Try Mai's way for one expression.
245 - 28
352 - 71
364 - 182
Find the value of 519 - 236. Show your thinking.
293 - 147
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 . . .”
