laurag82 laurag82
  • 07-10-2016
  • Mathematics
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what addition doubles fact can help you solve 4+5

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apologiabiology
apologiabiology apologiabiology
  • 07-10-2016
4+4=8, that's a doubles fact

4+1=5 so
8+1=9
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Аноним Аноним
  • 07-10-2016
It is 4 + 4 = 8
8 + 1 = 9 so the answer is 9

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