Unit 2 - Lesson 2 - Grade 2: Illustrative Mathematics - Formative Library | Library

Instructions

Grade 2 Unit 2
Lesson 2: Find the Unknown Addend
CC BY 2021 Illustrative Mathematics

How Did You Find It?

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What is the same and what is different between these tools?

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Find the number that makes the equation true. Show your thinking using the cubes, blocks, or drawings.

41 +_______ = 84

You Go This Way, I’ll Go That Way

Han and Mai use blocks to find the number that makes the equation true. 17 + _____ = 84

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Try this one on your own. Choose who will start with 21 and who will start with 96.

21 +_______ = 96

Show your partner how you found the number that makes the equation true.

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Find the number that makes the equation true. Show your thinking. Use blocks or cubes if it helps.

36 + _______ = 78