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6.4乘3.75乘55简便计算. 1.06x1.2%2.12怎么做 能...

我都懒得发了

0.4x[3.75÷i.5-0.5x(0.04+1.06)] =0.4x[2.5-0.5x1.1] =0.4x2.5-0.4x0.55 =1-0.22 =0.78

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