Maths qustions

1. 3/9+6/9=1                                      

2. 4/12+7/12=1

3. 15/7=2 1/7

4. 7/20+13/20=1

5. 0.3+6=6.3

6. 9/12+12/12=1

7. 3/17+16/17=1

8. ¾+¼=2

9. ¼ +¾=1

10. ⅜ +4/8=2

11. 17/3=7

12.  7/12+9/12=1

14. 9/3+4/3=1