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Unit 7 - Lesson 9 - Grade 2: Illustrative Mathematics
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Instructions
Lesson: Add Three-digit Numbers
Cool Down: Find the Sum
Grade 2 Unit 7
Lesson 9: Add Three-digit Numbers
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 9: Add Three-digit Numbers
CC BY 2021 Illustrative Mathematics®
Number Talk: Ten and Some More (Warm Up)
Find the value of each expression mentally.
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How Did You Add Three-digit Numbers?
Find the value of each expression. Show your thinking.
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Analyze and Add
Noah and Kiran showed how they found the value of 267 + 338.
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Priya used a diagram to find the value of 565 + 247.
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Question 1
1.
528 + 2
Question 2
2.
528 + 7
Question 3
3.
487 + 3
Question 4
4.
487 + 8
Question 5
5.
384 + 409
visibility
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Question 6
6.
757 + 152
visibility
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Question 7
7.
262 + 438
visibility
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Question 8
8.
575 + 166
visibility
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Question 9
9.
How is Noah and Kiran’s work the same? How is it different?
Question 10
10.
Which student found the correct value? Explain or show your thinking.
Question 11
11.
Did she find the correct value? Explain or show your thinking.
visibility
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