1) 100+200= 2) 500 - 400 = 3) 120 - 70 = 4) 150 - 90 = 5) 400 + 300 = 6) 800 + 200 = 7) 600 - 300 = 8) 720 + 80 =

Приемы устных вычислений

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Moslamalar

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