21 + 9 = , 24 + 5 =, 30 - 7 = , 19 + 6 =, 30 - 9 = , 28 - 4 = , 19 + 9 = , 20 + 6 = , 18 + 9 = , 29 - 7 = .

Dodawanie i odejmowanie w zakresie 30

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