|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+…+|98/99-99/100|等于几

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 07:07:24
|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+…+|98/99-99/100|等于几

|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+…+|98/99-99/100|等于几
|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+…+|98/99-99/100|等于几

|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+…+|98/99-99/100|等于几
=11/12-10/11+12/13-11/12+.+99/100-98/100
=99/100-10/11
=89/1100