Question

2.5×3.2×0.9，用简便方法计算？

23.2X3.1x0.9的简便计算

Answer 1

2.5×3.2×0.9
=2.5×0.8×4×0.9
=2×3.6=7.2

Answer 2

2.5×3.2×0.9
=2.5×4×0.8×0.9
=10×0.72
=7.2

Answer 3

2.5x3.2x0.9
=(2.5x4)x(0.8x0.9)
=10x0.72
=7.2

Answer 4

=2.5*4*0.8*0.9
=（2.5*4）*（0.8*0.9）
=10*0.72
=7.2

Answer 5

=2.5*4*0.8*0.9
=（2.5*4）*（0.8*0.9）
=10*0.72
=7.2