计算一乘1⼀3加二乘1⼀4加三乘1⼀5加四乘1⼀6加省略号加十乘1⼀12简便算法。

2025-05-18 06:07:48
推荐回答(1个)
回答1:

=(1-1/3+1/2-1/4+1/3-1/5+……+1/10-1/12)÷2
=(1+1/2-1/12)÷2
=17/24