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Chapter 11

Problem 1

What are compatible pairs in addition? A. Numbers that add or subtract without regrouping B. Numbers that easily combine to equal benchmark numbers C. Numbers that have the same number of digits D. Numbers that are even

Problem 5

The following statements are true about the benefits of invented strategies except: A. students develop number sense. B. ae faster than the standard algorithm. C. more teaching is required. D. basis for mental computation and estimation.

Problem 13

Each of the models below is an effective tool to support invented strategies for addition and subtraction except: A. virtual base-ten blocks. B. open number line. C. chunking off. D. bar diagrams.

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