Adding Fractions

Question 1:

3 6 + 3 6
6 6 = 1

Question 2:

1 7 + 5 7
6 7

Question 3:

2 5 + 3 5
5 5 = 1

Question 4:

12 20 + 2 5
20 20 = 1

Question 5:

2 20 + 4 8
24 40 = 3 5

Question 6:

1 4 + 5 12
8 12 = 2 3