1 4/9+3 2/7=13/9+23/7=91/63+207/63=298/63=4 46/63

3 5/6-4/9=23/6-4/9=69/18-8/18=61/18=3 7/18

5 7/12-2 2/15=3 7/12-2/15=43/12-2/15=215/60-8/60=207/60=3 27/60=3 9/20

4 11/14-3 2/7=1 11/14-2/7=25/14-2/7=25/14-4/14=21/14=1 7/14=1 1/2

10 1/3-5 4/9=5 1/3-4/9=16/3-4/9=48/9-4/9=44/9=4 8/9

2 3/5-1 6/7=1 3/5-6/7=8/5-6/7=56/35-30/35=26/35