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Estimate, then find the sum of 312+397

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  1. 6 June, 21:05
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    312 397 ___ 709 that the answer if summary number by number you going to find it.
  2. 6 June, 21:08
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    The estimate is 700 and the answer is 709. I did this all on paper so don't worry I am very good at estimating and adding.
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