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Revised Addition and subtraction with missing nu ...

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