Adding Fractions

Question 1:

2 6 + 2 6
4 6 = 2 3

Question 2:

1 5 + 2 5
3 5

Question 3:

2 7 + 3 7
5 7

Question 4:

1 20 + 5 6
53 60

Question 5:

10 15 + 1 3
15 15 = 1

Question 6:

1 4 + 3 5
17 20