1. 15/1 х 11/10 = 33/2 = 11 1/2
2. 17/17 x 17/16= 1 1/16
3. 7/13 x 1/4=7/52
4. 12/19 x 1/3 = 4/19
5. 25/6 x 9/5= 15/2=7 1/2
6. 9/16 : 3/2= 9/16 x 2/3 = 3/8
7. 12/7 x 4/15= 16/35
8. 11/10 : 11/3= 11/10 x 3/11= 3/10
9)
24/25: 2/5 = 24/25x5/2= 2 2/5
2 2/5 :6 = 7/18
7/18-1/3= 1/18
1/18:1/5 = 1/18 х 5/1= 5/18
5/18+1/6= 4/9