Seudónimo Seudónimo
  • 23-02-2016
  • Mathematics
contestada

break apart ones to make a ten then add and write a sum 23+9

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apologiabiology
apologiabiology apologiabiology
  • 23-02-2016
ok so

you can make a 10 with the 9

23+9=20+3+9=20+2+1+9=20+2+10=20+10+2=30+2=32
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