Answer:
11 1/8
Explanation:
First find the LCD: 8
3 1/2 = 3 4/8
4 1/4 = 4 2/8
6 1/8 = 6 1/8
2 3/4 = 2 6/8
Rewrite the problem
3 4/8 + 4 2/8 + 6 1/8 - 2 6/8
Solve