0.25x0.95x40是有简便运算的,你只需要要调整一下顺序就可以,比如:0.25x0.95x40=0.25x40x0.95=10x0.95=9.5
简便计算0.25×0.95×40=0.25x40x0.95=10x0.95=9.5
此题可用乘法结合律简化计算,0.25×40×0.95=10×0.95=9.5
0.25×0.95×40=(0.25×40)×0.95=10×0.95=9.5