Question

1.25×0.64×12.5怎么简便计算？

Answer 1

1.25×0.64×12.5
=1.25×0.8×0.8×12.5
=1.25×0.8×(0.8×12.5)
=1×10
=10
这道题运用了乘法结合律

Answer 2

0.64=0.8×0.8
1.25×0.64×12.5
=1.25×0.8×0.8×12.5
=1×10
=10

Answer 3

1.25×0.64×12.5
=（1.25×0.8）×（12.5×0.8）
=1×10
=10

Answer 4

1.25ⅹ0.64x12.5
=1.25ⅹ0.8ⅹ0.8ⅹ12.5
=1ⅹ0.8ⅹ12.5
=10

Answer 5

1.25×0.64x12.5
＝1.25x0.8x0.8×12.5
＝1x0.8×12.5
＝0.8x12.5
＝10