LESSON 3 Multiplying by Multiples of Ten

Reach for the Stars

Mrs. Dewey's class is about to begin a unit on the solar system. Irma, Nila, and Alexis think it would be fun to decorate the classroom. Mrs. Dewey allows them to stay after school to work on this project.

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In the problem 3 20 = ?, 3 and 20 are factors. The answer to a multiplication problem is the product. So, the product is what we are trying to find in this problem.

1. How would you solve 3  20? Explain your method to a partner.

Irma thinks about base-ten pieces when she solves the problem.