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Unit 7 - Lesson 10 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 7

Lesson 10: Add within 1,000

CC BY 2021 Illustrative Mathematics®

Grade 2 Unit 7

Lesson 10: Add within 1,000

CC BY 2021 Illustrative Mathematics®

Lesson: Add within 1,000

Number Talk: Use Sums to Find Sums (Warm Up)

Card Sort: Three-digit Sums

Find the Unknown Value

Cool Down: Different Methods for Adding within 1,000

Find the value of each expression mentally.

1
Pitanje 1
1.

199 + 23

1
Pitanje 2
2.

198 + 24

1
Pitanje 3
3.

297 + 25

1
Pitanje 4
4.

395 + 27

  • Sort the cards into 2 groups with your partner.

  • Make a group of expressions that you agree the value is less challenging to find.

  • Make another group of expressions that you agree the value is more challenging to find.

  • Keep any expressions together that you and your partner disagree on.

Sort the cards into 2 groups with your partner.

1
Pitanje 5
5.

Make a group of expressions that you agree the value is less challenging to find.

1
Pitanje 6
6.

Make another group of expressions that you agree the value is more challenging to find.

Keep any expressions together that you and your partner disagree on.

1
1
1

Oh no! Diego spilled paint on his paper and now he can’t see all the digits in each of his equations.

1
Pitanje 10
10.

What three-digit number makes the equation true? Show your thinking.

1
Pitanje 11
11.

What three-digit number makes the equation true? Show your thinking.

1
Pitanje 12
12.

Choose one expression and find the value by adding by place. Show your thinking.

1
Pitanje 13
13.

Explain why you chose this sum.

1
Pitanje 14
14.

Choose a different expression and find the value using a different method. Show your thinking.

1
Pitanje 15
15.

Explain why you chose this sum.

Pitanje 7
7.

Choose an expression that you feel is less challenging.

Find the value of the sum. Show your thinking.

Pitanje 8
8.

Choose an expression that you feel is more challenging.

Find the value of the sum. Show your thinking.

Pitanje 9
9.

Discuss one card you and your partner disagreed on. If you felt the expression was more challenging, explain why. If you felt the expression was less challenging, explain your method.