(-24)*(-1/3+5/6-7/8)-1.45*6+3.急

问题描述:

(-24)*(-1/3+5/6-7/8)-1.45*6+3.急

(-24)*(-1/3+5/6-7/8)=24x1/3-24x5/6+24x7/8=8-20+21=9-1.45*6+3.95*6=(3.95-1.45)x6=2.5x6=15