20+7= - 27, 39-9= - 30, 45-40= - 5, 99-1= - 98, 76+1= - 77, 84+2= - 86, 63-2= - 61, 22, 23, ... , 25, 26 - 24,

устный счёт 6 лет - 10.04.

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