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Subtraction within 20

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  • 12 - 3 =
    9
  • 11 - 4 =
    7
  • 13 - 4 =
    9
  • 10 - 8 =
    2
  • 10 - 6 =
    4
  • 13 - 6 =
    7
  • 14 - 6 =
    8
  • 11 - 6 =
    5
  • 10 - 7 =
    3
  • 10 - 5 =
    5
  • 15 - 9 =
    6
  • 15 - 7 =
    8
  • 20 - 5 =
    15
  • 16 - 8 =
    8
  • 11 - 2 =
    9
  • 12 - 5 =
    7
  • 17 - 8 =
    9
  • 10 - 3 =
    7
  • 17 - 9 =
    8
  • 16 - 9 =
    7
  • 20 - 7 =
    13
  • 18 - 9 =
    9
  • 10 - 9 =
    1
  • 14 - 7 =
    7
  • 14 - 9 =
    5
  • 16 - 7 =
    9
  • 11 - 8 =
    3
  • 12 - 4 =
    8
  • 20 - 9 =
    11
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