8x0.25x1.25x0.4= (0.25x0.4) x (1.25x8)=0.1 x 10= 1
8x0.25x1.25x0.4=(8×1.25)×(0.25×0.4)=10×0.1=1运用了乘法的交换律和结合律。
应用乘法交换律和结合律:8x0.25x1.25x0.4=(8×1.25)×(0.25×0.4)=10×0.1=1
8x0.25x1.25x0.4=8×1.25×(0.25×0.4)=10×0.1=1