括号十一分之八+十三分之人括号+括号十一分之二+十三分之二 简便记算

2025-04-07 10:34:34
推荐回答(1个)
回答1:

(8/11+8/13)+(2/11+2/13)
=(8/11+2/11)+(8/13+2/13)
=10/11+10/13
=130/143+110/143
=240/143