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Re: Level B Lesson 27

Hello Michelle,

Worksheet 10-2 asks the child to find the sums by applying the commutative law. For example, in 1 5, it is much easier to think of 5 1 than 1 5. That's using the commutative law.

Joan A. Cotter, Ph.D.
RightStart Mathematics by Activities for Learning, Inc.
http://www.alabacus.com

Re: Re: Level B Lesson 27

Thank you very much. That makes sense.