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Unit 7 - Lesson 15 - Grade 2: Illustrative Mathematics
By Formative Library
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Instructions
Lesson: Decompose a Ten and a Hundred to Subtract
Cool Down: Find the Error
Grade 2 Unit 7
Lesson 15: Decompose a Ten and a Hundred to Subtract
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 15: Decompose a Ten and a Hundred to Subtract
CC BY 2021 Illustrative Mathematics®
Elena’s Thinking
1
1
1
Walk About and Subtract
Find someone with a different number than you.
Find the difference between your numbers.
Show your thinking.
Trade cards and find a new partner.
Partner 1
1
Question 4
4.
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Partner 2
1
Question 5
5.
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Partner 3
1
Question 6
6.
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Noah found the value of 532 - 358. Here is his work.
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1
Question 1
1.
Use base-ten blocks or a base-ten diagram to show Elena’s steps.
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Question 2
2.
Finish Elena’s work to find the value of 726 - 558.
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Question 3
3.
What is another way you could use numbers or equations to show subtracting by place to find the value
of 726 - 558?
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Find the difference between your numbers.
Show your thinking.
Find the difference between your numbers.
Show your thinking.
Find the difference between your numbers.
Show your thinking.
Question 7
7.
Explain Noah's error.
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Question 8
8.
Show Noah a way to find the value of 532 - 358.
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