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30-11-2021
Mathematics

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Lesson 14 Homework
NYS COMMON CORE MATHEMATICS CURRICULUM

Thomas calculates 9 x 7 by thinking about it as 70 - 7 = 63. Explain Thomas' strategy.

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Mxrcuriie Mxrcuriie

30-11-2021

his strategy is to do it in parts. 10x7 is a little easier since anything x 10 just gets a 0 on the end of it. so 10x7=70 then he subtracted 7 to get the answer to 9x7 which is 63

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