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打开就是这啊 <qsED vErsion="3.5.0.62"> <Entry> ...

下载附件啊!!!!

0.627×13+0.627×52+0.627×35=0.627×(13+52+35)=62.7

(1)x÷0.57=2.4 x÷0.57×0.57=2.4×0.57 x=1.368;(2)1-1.05x+1.05x=0.874+1.05x 1.05x+0.874=1 1.05x+0.874-0.874=1-0.874 1.05x=0.126 1.05x÷1.05=0.126÷1.05 x=0.12;(3)0.2×(3.5-2x)=0.10.2×(3.5-2x)÷0.2=0.1÷0.2 3.5-2x=0.5 3.5-2x+...

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