1) 5 1/6-9=-3 5/6

8 2/3-(-3 5/6)=8 4/6+3 5/6=12 2/3

4.4-7 2/3=4 2/5-7 2/3=4 6/15-7 10/15=-3 4/15

12 2/3+(-3 4/15)=12 10/15-3 4/15=9 11/15

2) 3.3-5 5/6=3 3/10-5 5/6=3 9/30-5 25/30=-2 16/30=-2 8/15

8 1/4-11=8.25-11=-2.75

-2 8/15-(-2.75)=-2 8/15+2 3/4=-2 32/60+2 45/60=13/60

13/60+8.3=13/60+8 3/10=13/60+8 18/60=8 31/60