madiggs09 madiggs09
  • 13-09-2017
  • Mathematics
contestada

explain how you would estimate to subtract 189 from 643

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smrdelallana20
smrdelallana20 smrdelallana20
  • 13-09-2017
I would just round up to 200 and then subtract twelve or just subtract 200 what ever way u prefer. 
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