1) 7 1/11-4 5/11=7-4+1/11-5/11=3+1-5/11=3+(-4/11)3*11/11-4/11=33/11-4/11=29/11=2 7/11 2) 2 3/11+5 8/11=2+5+3/11+8/11=7 11/11=8 3) 8-6 2/11=2/11*11/11-2/11=22/11-2/11=20/11=1 9/11 4) 2 7/11-1 9/11=2-1+7/11-9/11=1+7/11-9/11=1+(-2/11)=1/11*11/11-2/11=11/11-2/11=9/11 5) 9/11+1 8/11=1+9/11+8/11=1+17/11=2 6/11