7 5/11 - 1 2/9 + 3 6/11 - 4 7/9=(7 5/11+3 6/11)-(1 2/9+4 7/9)=12 - 6=6
10 8/11 - 4 3/5 - 2 2/5 + 1 3/11=(10 8/11+1 3/11)-(4 3/5+2 2/5)=12-7=5
- 8 3/14 + 3 4/5 - 5 11/14 - 3 3/10=( - 8 3/14 - 5 11/14)+(3 4/5 - 3 3/10)= - 14 +(3 8/10-3 3/10)= - 14+5/10= - 14+1/2= - 13 1/2