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Unit 7 - Lesson 13 - Grade 2: Illustrative Mathematics
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Instructions
Lesson: Decompose Tens or Hundreds
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Cool Down: More Subtraction
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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®
Which One Doesn’t Belong: Blocks and Blocks (Warm Up)
Question 1
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.
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Question 2
2.
Explain what Mai did in Step 2.
Show what Mai should do next to find the difference.
visibility
View drawing
Question 3
3.
Write each expression next to the matching diagram.
visibility
View drawing
Question 4
4.
Find the value of the difference.
244 - 28
visibility
View drawing
Question 5
5.
Find the value of the difference.
256 - 64
visibility
View drawing
Question 6
6.
Find the value of the difference.
244 - 64
visibility
View drawing
Decompose a Ten or Hundred
Find the value of each difference. Show your thinking. Try Mai's way for one expression.
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Question 7
7.
245 - 28
visibility
View drawing
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Question 8
8.
visibility
View drawing
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1
Question 12
12.
Find the value of 519 - 236. Show your thinking.
visibility
View drawing
352 - 71
Question 9
9.
364 - 182
visibility
View drawing
Question 10
10.
293 - 147
visibility
View drawing
Question 11
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 . . .”