Unit 7 - Lesson 14 - Grade 2: Illustrative Mathematics

Which one doesn’t belong?

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What is the same about Tyler and Clare’s diagrams? What is different?

Work together to complete Tyler’s way and Clare’s way to find the value of 244 - 67.

What do Tyler and Clare’s diagrams look like after the last step? What is the same about these diagrams? What is different?

Andre wants to use diagrams and subtract by place to find the value of 341 - 68. He says he will decompose a ten and a hundred to subtract. Why do you think he said that?

Find the value of 1 expression from each group. Show your thinking.

Han wants to start by subtracting without decomposing any units.Which expression should he choose?

Find the value of the expression. Show your thinking.