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Unit 1- Lesson 3 - Grade 2: Illustrative Mathematics
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Lesson: Relate Addition and Subtraction within 20
Cool Down: Which Equations Are True?
Grade 2 Unit 1
Lesson 3: Relate Addition and Subtraction within 20
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 1
Lesson 3: Relate Addition and Subtraction within 20
CC BY 2021 Illustrative Mathematics®
Number Talk: Addition and Subtraction (Warm Up)
Find the value of each expression mentally.
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Make the Equation True
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Find the number that makes each equation true.
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Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Find the number that makes each equation true.
Question 5
5.
4 + _______= 20
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Question 6
6.
20 - _______= 4
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Question 7
7.
6 + _______= 20
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Question 8
8.
20 - _______= 10
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Question 9
9.
_______ + 3 = 20
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Question 10
10.
20 - 15 = _______
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Question 11
11.
20 - _______ = 18
visibility
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Question 12
12.
If you have time: _______ - 5 = 20
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Question 13
13.
_______ + 17 = 20
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Question 14
14.
20 - 9 = _______
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Question 15
15.
_______ + 5 = 20
visibility
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Question 16
16.
20 - _______ = 8
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