1 1/9+2,75+1/3= 1 1/9+2 3/4+1/3= 10/9+ 11/4+ 1/3= 40/36+99/36+12/36= 151/36= 4 7/36
3,5+5 1/7-2 3/14= 3 1/2+5 1/7-2 3/14= 7/2+36/7-31/14= 49/14+72/14-31/14= 90/14= 45/7= 6 3/7
7,6-4 2/3+2 1/15= 7 3/5-4 2/3+2 1/15= 38/5-14/3+31/15= 114/15-70/15+31/15= 75/15= 5
8,5+5/6-6,25= 8 1/2+5/6-6 1/4= 17/2+5/6-25/4= 102/12+10/12-75/12= 37/12= 3 1/12
2,25+11 1/15- 7 1/6= 2 1/4+11 1/15-7 1/6= 9/4+166/15-43/6= 135/60+664/60-430/60= 369/60= 6 9/60= 6 3/20
6,8-2 1/3+1,2= 6 4/5-2 1/3+1 1/5= 34/5-7/3+6/5= 102/15-35/15+18/15 =85/15= 17/3= 5 2/3