baileymarie0522 baileymarie0522

12-09-2017
Mathematics

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how can 400x20 help you slove 400x21

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lilxiong lilxiong

12-09-2017

It can help you solve 400 * 21 because you are breaking down the number 21 to 20+1 which can be used by using the distributive property 400(20+1).

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