12+12-12-12-12-12+99-21-12-12+789-123-123+789=
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/24 02:45:10
12+12-12-12-12-12+99-21-12-12+789-123-123+789=12+12-12-12-12-12+99-21-12-12+789-123-123+789=12+12-12
12+12-12-12-12-12+99-21-12-12+789-123-123+789=
12+12-12-12-12-12+99-21-12-12+789-123-123+789=
12+12-12-12-12-12+99-21-12-12+789-123-123+789=
1362