Mase08 Mase08
  • 16-10-2015
  • Mathematics
contestada

Could you use the double fact to find the sum for 4+5? Choose yes or no 4+4=8 Yes or no 5+5=10 yes or no 9+9=18 yes or no

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leonessa leonessa
  • 16-10-2015
yes.You can use 4+4=8
and then add 1
8+1=9
since 5 = 4+1 we add the 1 at the end
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