Question

2.5×3.2×1.25的简便运算

2.5×3.2×1.25的简便运算没啥可说

Answer 1

2.5×3.2×1.25
=2.5×4×0.8×1.25
=（2.5×4）×（0.8×1.25）
=10×1
=10

Answer 2

2.5×3.2×1.25
=2.5×0.4×8×1.25
=1×10
=10

Answer 3

2.5x3.2x1.25
=(2.5x4)x(0.8x1.25)
=10x1
=10

Answer 4

1.25×8×2.5×0.4

Answer 5

2.5×3.2×1.25
＝（2.5×4）×（0.8×1.25）
＝10×1
＝10