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Addition & Subtraction

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    Simple addition and subraction
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  • 15 - 8 =
    7
  •  15
  • 14 - 7 =
    7
  •  15
  • 12 - 4 =
    8
  •  15
  • 9 - 8 =
    1
  •  15
  • 4 - 0 =
    4
  •  15