20 - 19 = , 8 - 6 =  , 12 - 9 = , 10 - 6 =, 12 - 7 = , 14 - 8 = , 11 - 4 = , 15 - 7 = , 18 - 9 =, 20 -10 =.

Вычитание в пределах 20

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