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Dodawanie i odejmowanie liczb w zakresie 20.

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  • 12 - 3 =
    9
  • 14 - 8 =
    6
  • 7 + 7 =
    14
  • 8 + 5 =
    13
  • 9 + 3 =
    12
  • 8 + 8 =
    16
  • 9 + 9 =
    18
  • 7 + 8 =
    15
  • 13 - 5 =
    8
  • 12 - 8 =
    4
  • 15 - 8 =
    7
  • 11 - 6 =
    5
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