Adding Fractions

Question 1:

4 8 + 4 8
8 8 = 1

Question 2:

3 7 + 4 7
7 7 = 1

Question 3:

5 10 + 3 10
8 10 = 4 5

Question 4:

3 10 + 3 8
27 40

Question 5:

1 2 + 1 8
5 8

Question 6:

1 4 + 2 12
5 12