30%*80%-(1-130%*50)*20%怎么算不出来?_数学解答

30%*80%-(1-130%*50)*20%怎么算不出来?

人气：335 ℃　时间：2020-03-23 04:13:25

解答

=0.3*0.8-(1-1.3*0.5)*0.2
=0.24-(1-0.65)*0.2
=0.24-0.35*0.2
=0.24-0.07
=0.17
=17%