crespojonnierjovzkrv crespojonnierjovzkrv
  • 09-09-2017
  • Mathematics
contestada

Explain how you would estimate to subtract 189 from 643

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JustKThings
JustKThings JustKThings
  • 09-09-2017
You would round both numbers and subtract. For example 189 can round to 200 and 643 would round to 600. Now just subtract, 600-200=400
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