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Sumas dobles

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  • 8+8=
    16
  • 8+9=
    17
  • 12+11=
    23
  • 10+10=
    20
  • 12+12=
    24
  • 4+4=
    8
  • 6+7=
    13
  • 13+12=
    15
  • 8+7=
    15
  • 6+5
    11
  • 7+7=
    14
  • 4+5=
    9
  • 5+5=
    10
  • 9+9=
    18
  • 11+11=
    22
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