baileymarie0522
baileymarie0522 baileymarie0522
  • 12-09-2017
  • Mathematics
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how can 400x20 help you slove 400x21

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lilxiong
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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