Question

2.5乘0.64乘1.25（简便计算）？

点5×0点64×1点二五简便计算

Answer 1

2.5×0.64×1.25
＝2.5×0.8×0.8×1.25
＝（2.5×0.8）×（1.25×0.8）
＝2×1
＝2

Answer 2

2.5*0.64*1.25
=（2.5*4）*0.02*（8*1.25）
=10*0.02*10
=2

Answer 3

2.5×0.64×1.25
=2.5×0.8×0.8×1.25
=（2.5×0.4）×2×（0.8×1.25）
=1×2×1
=2

Answer 4

2.5乘0.64乘1.25的简便计算：
2.5×0.64×1.25
=0.8×2.5×0.8×1.25
=2×1
=2

Answer 5

解原式=（2.5×0.8）×（0.8×1.25）
=2×1
=2