Seudónimo Seudónimo
  • 19-01-2017
  • Mathematics
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Why do you sometimes need to regroup in 3 digit addition problems

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Аноним Аноним
  • 19-01-2017
Because for example 349+567 is something you need to regroup.You start by the ones.9+7=16. You don't always need to regroup though
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