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Dodawanie w zakresie 20

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  • 13-4=
    9
  • 12-2=
    10
  • 12+7
    19
  • 14+2+2=
    18
  • 20-10=
    10
  • 13-3=
    10
  • 12-4=
    8
  • 13+5
    18
  • 20-10-10=
    0
  • 20-1=
    19
  • 20-5-5=
    10
  • 15-4=
    11
  • 13+6=
    19
  • 15+3=
    18
  • 11+9
    20
  • 15+2
    17
  • 10+10
    20
  • 8+5
    13
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