(6целых 1/8-1,75):(9-2,2×(5целых 6/11-3,5))×1целую 2/7=(3 1/4-7/4):(9-11/5(30/11-7/2))2/7=(3/4-7/4):(9-11/5(-17/22))2/7=1:(9+17/10)2/7=-10/107×2/7=-20/749