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15 September, 18:44

Explain how you would estimate to subtract 189 from 643

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  1. 15 September, 19:03
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    Well frist you cant do 189 from 643. u have to do 643 - 189. and that well be 743
  2. 15 September, 19:09
    0
    643 will round to 600 and 189 will round to 299 so 600 - 200 = 400
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