2.25×7又5⼀1+2.8÷9⼀4 这道题怎么用简便方法计算?

2024-11-26 11:42:07
推荐回答(1个)
回答1:

2.25×7又5/1+2.8÷9/4
=2.25×7.2+2.8×2.25
=2.25×(7.2+2.8)
=2.25×10
=22.5