7.2乘14.5+17乘2.8怎么做?简便计算

2024-12-01 13:00:31
推荐回答(2个)
回答1:

7.2×14.5+17×2.8
=7.2×14.5+14.5×2.8 +2.5×2.8
=14.5×10+2.5×4×0.7
=145+10×0.7
=152

回答2:

17乘(14.5+2.8)=17乘17=289