|1⼀3-1⼀2|+|1⼀4-1⼀3|+|1⼀5-1⼀4|+…+|1⼀10-1⼀9| 等于多少啊?谢谢!

2024-12-15 19:45:42
推荐回答(2个)
回答1:

|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+…+|1/10-1/9|
=1/2-1/3+1/3-1/4+1/4-……+1/9-1/10
=1/2-1/10
=2/5

祝你开心

回答2:

9/20