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K-5 Grade 5 Unit 4 Lesson 4

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•K-5 Math 6-8 Math 9-12 Math

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Lesson 1 Lesson 2 Lesson 3 •Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18 Lesson 19 Lesson 20

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Lesson 4

Warm-up Activity 1 Activity 2

Unit 4, Lesson 4

Standard Algorithm: One-digit and Multi-digit Numbers, with Composing

Grade 5

Warm-up

Find the value of each product mentally.

Activity 1

Han calculates , using partial products.

multiply. three hundred eighteen times 3.

Elena calculates , using the standard algorithm.

multiply. three hundred eighteen times 3 equals nine hundred fifty four.

What does the 2 in Elena’s calculation represent? Explain or show your reasoning.
What does the 5 in Elena’s solution represent? Explain or show your reasoning.

Activity 2

Calculate each product, using Elena’s strategy.