find the valeu of N. choose your answer.

1. 6 1/6 + 4 2/6 = N
2. 50/80 - 30/80 = N
3 7 3/4 +3 21 4 = N
4. 5/ 10 + 7/10 = N
5. 12/20 - 8/20 = N

a. 1 2/15
b. 1/4
c. 11 1/4
d. 10 1/2
e. 1/5
f. 1 1/5