0.73解析:0.25×0.73×4=(0.25×4)×0.73=1×0.73=0.73
0.25*0.13*4=(0.25*4)*0.73=1*0.73=0.73
0.25x4x0.73=1x0.73=0.73
0.25×0.73×4=(0.25×4)×0.73=1×0.73=0.73