Add mixed numbers with unlike denominators

Add whole numbers and fractions (with a common denominator), then regroup. Type like 3 1/4.

1. 1 1/2 + 4 3/4 =
2. 2 1/4 + 4 5/8 =
3. 2 2/3 + 3 1/6 =
4. 3 2/3 + 1 5/6 =
5. 4 1/4 + 1 3/8 =
6. 3 2/5 + 4 1/10 =
7. 4 1/6 + 4 7/12 =
8. 5 1/5 + 2 9/10 =
9. 1 1/5 + 1 1/2 =
10. 6 1/4 + 2 2/3 =
11. 5 1/6 + 2 4/5 =
12. 4 3/5 + 1 3/4 =
13. 5 1/7 + 4 5/6 =
14. 4 1/6 + 3 3/5 =
15. 3 2/5 + 4 3/4 =
16. 1 1/3 + 2 6/7 =
17. 1 4/9 + 1 1/4 =
18. 5 5/9 + 2 3/7 =
19. 5 4/7 + 2 5/11 =
20. 6 6/7 + 5 1/4 =