1.2乘2.5加0.8乘2.5的简便方法是什么

速度啊!!!!!!!
2025-05-16 23:22:44
推荐回答(4个)
回答1:

2.5X(1.2+0.8)=5

回答2:

1.2×2.5+0.8×2.5
=(1.2+0.8)×2.5
=2×2.5
=5

回答3:

1.2乘2.5加0.8乘2.5
=(1.2+0.8)×2.5
=2×2.5
=5

回答4:

1.2x2.5+0.8x2.5
=(1.2+0.8)x2.5
=2x2.5
=5