Unit 11 Contents

Ana, Jerome, and Jessie saw that they had solved the problem three different ways. They compared their answers. They said they would know they had the right answer if all the answers matched. Here is Jerome's and Jessie's work.

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Mrs. Dewey asked the three students to put their work on the board. She asked the students in her class to compare their work.

1. What is the same about the three ways of solving the problem?
2. What is different?
4. Ming also used the all-partials method. He multiplied 20 20 first.
He liked this method because the first product he found was the most important. Why might Ming think his first product was the most important?