1.(+3)+(-4)=?
2.(+3)-(+4)=?
3.(-3)+(+4)=?
4.(-3)+(-4)=?
5.(-3)-(+4)=?
6.(-3)-(-4)=?
***Please tell me the 方程式****THX
收錄日期: 2021-05-01 14:03:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070827000051KK03759