davian28 davian28
  • 16-09-2015
  • Mathematics
contestada

use compatible number to estimate the sum of 428+286

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madisocriok06 madisocriok06
  • 16-09-2015
428
+286
714 that is your answer
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DaBoss81 DaBoss81
  • 16-09-2015
My real answer is 712 but it estimate to 700.
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