5/3+3/8=8/8=1

5/12-13/72=30/72-13/72=17/72

3/10-1/10=2/10=1/5

1/30+7/30=8/30=4/15

3/5-1/7=21/35-5/35=16/35

3/8+5/24=9/24+5/24=14/24=7/12

5/12+1/60=25/60+1/60=26/60=13/30

9/10+14/15=27/30+28/30=55/60=11/12

21/6-7/6=14/6=7/3

79/9-47/9=32/9

7/2+11/6=21/6+11/6=32/6=16/3

35/4+23/8=70/8+23/8=93/8

1/4*2/3=1/6

2/3*3/8=1/4

15/16*8/25=120/400=3/10

3/4*1/6=3/24=1/8