1.8/0.25求巧算 急1.8/0.25求巧算 急
1.8/0.25求巧算 急1.8/0.25=(1.8x4)/(0.25x4)=7.2/1=7.2
1.8/0.25=1.8/(1/4)=1.8*4=7.2
1.8/0.25=1.8×4=7.2