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Unit 7 - Lesson 3 - Grade 2: Illustrative Mathematics

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Last updated 11 months ago
15 questions
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Grade 2 Unit 7
Lesson 3: Count on or Count Back to Subtract
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 3: Count on or Count Back to Subtract
CC BY 2021 Illustrative Mathematics®
Lesson: Count on or Count Back to Subtract
1
Cool Down : Mystery Number
1

Number Talk: Tens and Hundreds (Warm Up)

Find the value of each expression mentally.
1
Question 1
1.

1
Question 2
2.

1
Question 3
3.

1
Question 4
4.

Jump Back, Back, Back

1
Question 5
5.

What do you notice?

1
Question 6
6.

What do you wonder?

1
Question 7
7.

Try Andre’s way to find the value of
189 - 73.

Show your thinking. Use a number line if it helps.

1

Who Spilled Paint?

Question 9
9.

Oh no! Diego spilled paint on his paper and now he can’t see all the numbers.

Find the number that makes each equation true.
1
Question 10
10.
250 + _______ = 1,000
1
Question 11
11.
600 - 440 = _______
1
1
1
Question 15
15.

Find the number that makes the equation true.


Show your thinking.

Question 8
8.

Find the value of 647 - 46 in your own way.

Show your thinking. Use a number line if it helps.

Question 12
12.
680 + _______ = 900
Question 13
13.
_______ + 590 = 1,000
Question 14
14.
900 - 370 = _______