四十乘三点七乘0.25等于多少用简便方法计算下面各题？40x3.7x0.25=0.25x40x3.7=10x3.7=37
40×3.7×0.25=（40×0.25）×3.7=10×3.7=37
40*3.7*0.25=40*0.25*3.7=10*3.7=37
