0.32x30 12.5简便?

2024-12-25 08:08:13
推荐回答(2个)
回答1:

0.32x30 x12.5
=0.4x0.8x30 x12.5
=(0.4x30)x(0.8x12.5)
=12x10
=120

回答2:

列式计算
0.32x30+12.5
=9.6+12.5
=22.1