18.6-18.6*0.31简算

分类: 作业答案 • 2021-12-20 09:47:30

问题描述：

18.6-18.6*0.31简算

答

=18.6*(1-0.31)
=18.6*0.69
=(20-1.4)*0.69
=13.8-0.966
=12.834