30%*80%-(1-130%*50)*20%怎么算不出来?

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30%*80%-(1-130%*50)*20%怎么算不出来?
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30%*80%-(1-130%*50)*20%怎么算不出来?
30%*80%-(1-130%*50)*20%怎么算不出来?

30%*80%-(1-130%*50)*20%怎么算不出来?
=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%

0.3乘0.8得0.24
1减1.3乘50得-64
-64乘0.2得-12.8
0.24-(-12.8)=0.24+12.8=13.04