1) 3 1/9 : 2 1/3 - 2 5/6 = 28/ 9 * 3/7 - 2 5/6 = 4/3 - 2 5/6 = 1 1/3 - 2 5/6= 1 1/3 + ( - 2 5/6) = - ( 2 5/6 - 1 1/3) = - ( 2 5/6 - 1 2/6) = - 1 3/6
3) 10 16/17 : 8 5/11 + 1 2/3 = 186/17 * 11/93 + 1 2/3 = 22/17 + 1 2/3 = 1 5/17 + 1 2/3 = 1 15/51 + 1 34/51 = 2 49 /51