Question

1.25×0.25×3.2简便计算

Answer 1

Answer 2

=1.25×0.25×0.4×0.8
=(1.25×0.8)×(0.4×0.25)
=1

Answer 3

1.25×0.25×3.2
=5/4×1/4×16/5
=1

Answer 4

1.25*0.25*（8*0.4）=1.25*8*0.25*0.4=10*0.1=1