|11/12-12/13|+|12/13-13/1

|11/12-12/13|+|12/13-13/14|+|13/14-14/15|+|14/15-15/16|简便运算

2个回答

|11/12-12/13|+|12/13-13/14|+|13/14-14/15|+|14/15-15/16|
=12/13-11/12+13/14-12/13+14/15-13/14+15/16-14/15
=15/16-11/12