Unit 2 Contents

Sharing Strategies

19. Kim solved a problem this way:
1. Use circle pieces to show or tell if you agree or disagree with Kim's solution. If you disagree, find the correct answer.
2. Explain a strategy Kim can use to add fractions with unlike denominators.
20. Frank is solving − . Here is his thinking:

1. Can Frank rename as thirds? Why or why not?
2. Which fraction can Frank rename to solve − ? Rename the fraction and solve the problem.
21. Chris and Tara are working together to solve − . They want to find fractions with common denominators.

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1. Compare the students' answers. Do you agree with Chris or with Tara? Explain your thinking.
2. First solve − Chris's way. Then solve it Tara's way using aqua pieces. Compare your solutions. Does Chris's strategy work when solving − ? Show or tell how you know.
3. Does Chris's strategy work when solving the problem − ? Show or tell how you know by solving the problem a second way.