3.8-3.8*0.99简便计算
问题描述：
3.8-3.8*0.99简便计算
答
3.8-3.8*0.99=3.8-3.8+3.8*0.01=0.038
答
3.8-3.8*0.99
=3.8*(1-0.99)
=3.8*0.01
=0.038