4分之3*0.375+8分之3*3.25 怎么简便

问题描述:

4分之3*0.375+8分之3*3.25 怎么简便

3/4 * 0.375 + 3/8 * 3.25 = 3/8 * 2 * 0.375 + 3/8 * 3.25 = 3/8 * (2*0.375+3.25)=3/8 * (0.75+3.25) = 3/8 * 4 = 3/2 = 1.5