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18以下加減法

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  • 9+5=
    14
  • 18-5
    13
  • 15-7=
    8
  • 9+8
    17
  • 12-6
    6
  • 16-7
    9
  • 14-10=
    4
  • 8+7=
    15
  • 16-10=
    6
  • 5+7=
    12
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