[17.1-17.1/(3.1-0.7)]*0.6简算

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[17.1-17.1/(3.1-0.7)]*0.6简算
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[17.1-17.1/(3.1-0.7)]*0.6简算
[17.1-17.1/(3.1-0.7)]*0.6简算

[17.1-17.1/(3.1-0.7)]*0.6简算
提取公因数=17.1*[1-1/2.4]*0.6
=17.1(0.6-1/4)=17.1*7/20=1710*7*5/100=