Question

1.25*2.5*0.64*0.5的简便算法

1.25*2.5*0.64*0.5的简便算法是多少,好的话又追加分

Answer 1

1.25*2.5*0.64*0.5=1.25*0.8*2.5*0.5*0.8=1

Answer 2

2.5*0.5是1.25，再乘1.25就是5/4的平方为25/16，16再与0.64约分，就成了0.04*25，结果是1

Answer 3

1.25*2.5*0.64*0.5
=1.25*2.5*（2*0.4*0.8)*0.5
=(1.25*0.8)*(2.5*0.4)*(0.5*2)
=1*1*1
=1

Answer 4

汗```1.25*0.8*2.5*0.8*0.5

Answer 5

1.25*0.8*2.5*0.4*1=1