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Missing Addends

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  • 13=__+9
    4
  • 5+__=7
    2
  • 10=__+7
    3
  • 3+__=4
    1
  • 2+__=4
    2
  • 5+__=15
    10
  • __+1=6
    5
  • 15= 9+__
    6
  • __+2=2
    0
  • __+6=12
    6
  • 17=__+12
    5
  • 7+__=10
    3
  • 3+__=5
    2
  • __+3=9
    6
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