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Unit 2 - Lesson 2 - Grade 2: Illustrative Mathematics
By Formative Library
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Last updated about 1 year ago
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Instructions
Lesson: Find the Unknown Addend
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1
Cool Down: Find the Unknown Addend
1
Grade 2 Unit 2
Lesson 2: Find the Unknown Addend
CC BY 2021 Illustrative Mathematics
Grade 2 Unit 2
Lesson 2: Find the Unknown Addend
CC BY 2021 Illustrative Mathematics
How Did You Find It?
Question 1
1.
What is the same and what is different between these tools?
Question 2
2.
Find the number that makes the equation true. Show your thinking using the cubes, blocks, or drawings.
41 +
_______
= 84
visibility
View drawing
You Go This Way, I’ll Go That Way
Han and Mai use blocks to find the number that makes the equation true. 17 + _____ = 84
1
1
1
Question 6
6.
Find the number that makes the equation true. Show your thinking. Use blocks or cubes if it helps.
36 + _______ = 78
visibility
View drawing
Question 3
3.
Han starts by using blocks to show 17. Show how he could find the number that makes the equation true.
visibility
View drawing
Question 4
4.
Mai starts by using blocks to show 48. Show how she could find the number that makes the equation true.
visibility
View drawing
Question 5
5.
Try this one on your own. Choose who will start with 21 and who will start with 96.
21 +_______ = 96
Show your partner how you found the number that makes the equation true.