7.24乘0.1+0.5乘72.4+0.049乘724

显示全部楼层 · 2009-2-28 18:04:20

7.24*0.1+0.5*72.4+0.049*724=7.24*0.1+5*7.24+4.9*7.24=7.24*(0.1+5+4.9)=7.24*10=72.4...

千问 · 2009-2-28 18:04:20

把0.5*72.4换成5*7.24,把0.049*724换成4.9*7.24.具体式子如下：7.24*0.1+0.5*72.4+0.049*724=7.24*0.1+5*7.24+4.9*7.24=7.24*(0.1+5+4.9)=7.24*10=72.4...

千问 · 2009-2-28 18:04:20

7.24乘0.1+0.5乘72.4+0.049乘724=7.24*0.1+7.24*10*0.5+7.24*100*0.049=7.24*0.1+7.24*5+7.24*4.9=7.24*(0.1+5+4.9)=7.24*10=72.4...

千问 · 2009-2-28 18:04:20

7.24*(0.1+5+4.9)=7.24*10=72.4...

千问 · 2009-2-28 18:04:20

=7.24*((0.1+5+4.9)=72.4...