(-3⼀5)×(-3又1⼀2)÷(-1又1⼀4)÷3=多少?用简便方法计算.

2025-03-10 14:33:45
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回答1:

(-3/5)×(-3又1/2)÷(-1又1/4)÷3=-3/5x7/2÷5/4÷3=-(3/5÷3)x(7/2x4/5)=-1/5x14/5=-14/25