3,(6) = (36-3)/9 = 33/9 = 11/3
0,(3) = 3/9 = 1/3
0,1(6) = (16-1)/90 = 15/90 = 1/6
2,75 = 275/100 = 11/4
2,(3) = (23-2)/9 = 21/9 = 7/3
_____________________
11/3 - (1/3 + 1/6) - (11/4 - 7/3) =
= 11/3 - [(2+1)/6] - [(33-28)/12] =
= 11/3 - 3/6 - 5/12 =
= (44-6-5)/12 =
= 33/12 =
= 11/4