Unit 9 - Lesson 8 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 9

Lesson 8: Add and Subtract Within 100

CC BY 2021 Illustrative Mathematics®

Akwankyerɛ

Grade 2 Unit 9

Lesson 8: Add and Subtract Within 100

CC BY 2021 Illustrative Mathematics®

Lesson: Add and Subtract Within 100

Number Talk: Add by Place (Warm Up)

Find the value of each expression mentally.

9 + 5

20 + 30

29 + 35

229 + 435

Heads Up, Add and Subtract within 100

Write an equation that shows the value you found for each round you play.

Round 1:

Round 2:

Round 3:

Centers: Choice Time

Five in a Row

Target Numbers

Cool Down: Practice for Fluency

Unit 9 - Lesson 8 - Grade 2: Illustrative Mathematics

Number Talk: Add by Place (Warm Up)

Heads Up, Add and Subtract within 100

Centers: Choice Time

Unit 9 - Lesson 8 - Grade 2: Illustrative Mathematics

Number Talk: Add by Place (Warm Up)

9 + 5

20 + 30

29 + 35

229 + 435

Heads Up, Add and Subtract within 100

Round 1:

Round 2:

Round 3:

Centers: Choice Time

Five in a Row

Target Numbers

How have you improved with adding and subtracting within 100?

What do you still want to work on?

9 + 5

20 + 30

29 + 35

229 + 435

Round 1:

Round 2:

Round 3:

Five in a Row

Target Numbers

How have you improved with adding and subtracting within 100?

What do you still want to work on?