0.8×0.25x0.4×12.5

更新时间2020-12-01 06:08:54

0.8×0.25x0.4×12.5

=(0.8*12.5)*(0.25*0.4)

=10*0.1

=1

0.8×0.25x0.4×12.5

=(0.8×12.5)×(0.25×4)（乘法交换律）

=10×1

=10