Adding Fractions

Question 1:

4 10 + 2 10
6 10 = 3 5

Question 2:

1 9 + 7 9
8 9

Question 3:

1 5 + 4 5
5 5 = 1

Question 4:

7 15 + 1 2
29 30

Question 5:

3 5 + 8 20
20 20 = 1

Question 6:

2 5 + 1 2
9 10