Rounding numbers to estimate the sum 256+321

asked Jun 23, 2016 9.0k views

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by Peza

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4 votes

add those to numbers together. you will get 577. if the last number is over 5 you round up. to 580.

Mikebmassey answered Jun 26, 2016

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1 vote

$256\approx260\\\\321\approx320\\\\therefore\\\\256+321\approx260+320=\boxed{580}$

Flutterian answered Jun 29, 2016

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