Question

0.8乘0.25乘0.4乘12.5简便计算

Answer 1

0.8乘0.25乘0.4乘12.5
=0.8×12.5×（0.25×0.4）
=10×0.1
=1

Answer 2

0.8*0.25*0.4*12.5
=（0.8*12.5）*（0.25*0.4）
=10*0.1
=1
*为乘号

Answer 3

0.25*0.4=0.1
0.8*1.25=1
0.1*1