Unit 2 - Lesson 9 - Grade 2: Illustrative Mathematics

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Note from the author:

Grade 2 Unit 2
Lesson 9: Add and Subtract Within 100
CC BY 2021 Illustrative Mathematics

Instructions

Grade 2 Unit 2
Lesson 9: Add and Subtract Within 100
CC BY 2021 Illustrative Mathematics

Lesson: Add and Subtract Within 100

Which One Doesn’t Belong: Tens and Ones (Warm Up)

Which one doesn’t belong?

Sort and Find the Value

Match each expression to a base-ten diagram.

Add or Subtract

Find the value of each expression. Show your thinking. Use blocks if it helps.

Cool Down: Find the Value Your Way

Find the value of each expression. Show your thinking. Use blocks if it helps.