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Subtraction (within 20)

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  • 14-7
    7
  • 16-12
    4
  • 20-8
    12
  • 9-2
    7
  • 14-12
    2
  • 20-11
    9
  • 7-1
    6
  • 19-9
    10
  • 18-1
    17
  • 18-13
    5
  • 12-8
    4
  • 20-5
    15
  • 6-0
    6
  • 19-0
    19
  • 20-12
    8
  • 15-8
    7
  • 15-1
    14
  • 15-10
    5
  • 19-17
    2
  • 17-4
    13
  • 15-13
    2
  • 19-1
    18
  • 14-6
    8
  • 19-6
    13
  • 20-17
    3
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