joy18
joy18 joy18
  • 16-10-2015
  • Mathematics
contestada

■+7+30=47/ use addition properties to find the unknown number. write the property that you used.

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annieola909
annieola909 annieola909
  • 16-10-2015
well if you know 30 +7 =37 so you do 47-37 and get 10
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