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Add and subtract 1-digit and 2-digit numbers to  ...

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