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Math addition subtraction

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  • 9+2
    11
  • 10+5
    15
  • 5+13
    18
  • 11+9
    20
  • 1+15
    16
  • 5-2
    3
  • 9-7
    2
  • 7+8
    15
  • 12-5
    7
  • 9-3
    6
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