1 3/11-【（2.75-1 5/12）/1 1/3】简算
问题描述：
1 3/11-【（2.75-1 5/12）/1 1/3】简算
答
=13/11-[(11/4-15/12)/11/3]
=13/11-[11/4/11/3-15/12/11/3]
=13/11-1/12-5/12/11
=166/12/11-11/12/11-5/12/11
=160/12/11
=40/33