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Unit 7 - Lesson 8 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 7
Lesson 8: Compose Tens and Hundreds to Add
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 7
Lesson 8: Compose Tens and Hundreds to Add
CC BY 2021 Illustrative Mathematics®
Lesson: Compose Tens and Hundreds to Add

How Many Do You See: Too Many Tens (Warm Up)

How many do you see?

How do you see them?

Compare the Sums

Find the value of each sum. Show your thinking. Use base-ten blocks if it helps.

273 + 18

273 + 81

273 + 88

What was the same and different about the sums?

Different Ways to Show Your Thinking

Priya and Lin were asked to find the value of 358 + 67.

What do you notice about their work?

What is the same and different about their representations?

Be prepared to explain your thinking.


Find the value of 546 + 86.

Show your thinking. Use base-ten blocks if it helps.

Cool Down: Make Tens and Hundreds

Find the value of 278 + 65.

Show your thinking. Use base-ten blocks if it helps you.