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K-5 Grade 2 Unit 7 Lesson 8

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Lesson 8

Warm-up Activity 1 Activity 2

Unit 7, Lesson 8

Compose Tens and Hundreds to Add

Grade 2

Warm-up

How many do you see? How do you see them?

Base ten diagram. 2 hundreds, 7 tens, 8 ones.

Base ten diagram. 3 hundreds, 7 tens, 10 ones.

Base ten diagram. 3 hundreds, 12 tens, 6 ones.

Activity 1

Find the value of each sum. Show your thinking, using objects, drawings, numbers, or words.

How are the sums alike? How are they different?

<p>Two students. One working with base ten blocks, the other writing 273 plus 81.</p>

Activity 2

Priya and Lin find the value of .

Priya’s work

Lin’s work

How are Priya’s and Lin’s work alike? How are they different? Explain your reasoning.
Find the value of .

Show your thinking, using objects, drawings, numbers, or words.