0.8×0.25×0.4=0.8x(0.25x0.4)=0.8x0.1=0.08希望能帮到你!
0.8×0.25×0.4=0.8×0.1=0.08
0.8×0.25×0.4=0.8×(0.25×0.4)=0.8x0.1=0.08