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Parts of 20: addition and subtraction

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