1/5*8+0.6*0.2+1/5*40%有简算吗?有帮我下

问题描述:

1/5*8+0.6*0.2+1/5*40%有简算吗?有帮我下
五分之一乘以八加零点六乘以点二加五分之一乘以百分之四十

1/5*8+0.6*0.2+1/5*40%
=0.2*(8+0.6+0.4)
=0.2*9
=1.8