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dodawanie i odejmowanie do 20

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  • 20 - 8 =
    14
    13
    12
    11
  • 13 + 0 =
    11
    12
    14
    13
  • 19 - 6 =
    14
    13
    12
    15
  • 11 + 9 =
    19
    20
    18
    21
  • 11+ 8 =
    19
    18
    17
    20
  • 19 - 8 =
    10
    11
    12
    13
  • 17 - 2 =
    14
    15
    17
    16
  • 14 + 5 =
    20
    19
    18
    17
  • 14 + 6 =
    21
    19
    20
    18
  • 12 + 5 =
    116
    17
    18
    20
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