выполните действия 1) 3/8×4/5÷9/10;2) 6/7÷3/5×1 2/5;3) 2 2/11×1 3/8:3/4;5) 3/5×(2 2/3:3 1/5);6) 1 1/8×(9 1/3:1 3/4
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