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1.38×1.2×0.5=?这道题怎么用简便方法算

1.38×1.2×0.5 =1.38x(1.2x0.5) =1.38x0.6 =0.828 朋友,请及时采纳正确答案,下次还可能帮到您哦,您采纳正确答案,您也可以得到财富值,谢谢。

1.38乘1.2乘0.5 =1.38*1.2*0.5 =1.38*0.6 =【1.4-0.02】*0.6 =0.84-0.012 =0.828 满意采纳

=1.656×0.5 =0.828

意思是一点三八乘以零点五。答案0.69。因为计算机里面没有乘号,而且字母X与乘号写法一样,所以用*号替代乘号。而书面则写成正规的乘号。

如下

可能是1:50的图纸,在上面用比例尺量的长度

4.8一3.62一O.38 =4.8一(3.62十0.38) =4.8一4 =0.8 32.5一(2.5一o.89) =32.5一2.5十0.89 =3o十0.89 =30.89 1.38十0.22十o.62 =1.38+0.62十o.22 =2+0.22 =2.22

3又3/4×0.2÷1.38×5.84 =15/4×1/5÷69/50×146/25 =3/4×50/69×146/25 =3/4×292/69 =73/23 =3又4/23

=0.2×5×0.138 =1×0.138 =0.138

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