求这几道题的简使算法,急.12.12/1.23*12.3 5.4*42/2.7 478/0.25/0.2/0.5/0.4 5.6*0.81/0.7/0.09
问题描述：
求这几道题的简使算法,急.12.12/1.23*12.3 5.4*42/2.7 478/0.25/0.2/0.5/0.4 5.6*0.81/0.7/0.09
12.12/1.23*12.3 5.4*42/2.7 478/0.25/0.2/0.5/0.4 5.3*0.81/0.7/0.09
上面没有分开
答
12.12*12.3/1.23=121.2
5.4/2.7 *42=84
478/(0.25*0.4)/(0.2*0.5)=47800
5.6/0.7*(0.81/0.09)=72
还要答案吗?还有,补充出错了.