1. 5/9+13/27=15/27+13/27=28/27=1 1/27
2. 3/8 + 5/24= 9/24 + 5/24= 14/24=7/12
3. 5/12-13/72= 30/72-13/72=17/72
4. 3/5 - 1/7= 21/35-5/35= 16/35
5. 5/12+1/60= 25/60 + 1/60= 26/60= 13/30
6. 9/17 - 19/68= 36/68-19/68= 19/68
7. 9/10+4/15= 27/30+8/30= 35/30= 7/6= 1 1/6
8. 4/15-11/60=16/60-11/60= 5/60= 1/12