Hi. If you need me to explain please tell me so I will edit this comment. I'll just solve the answers for you... basically if they have a common denominator just add/ subtract, and if they don't, make it so they do by multiplying the same on each side.
2) a. 1 3/4 + 2 1/4 = 4 b. 3 7/10 + 1 1/10 = 4 4/5 c. 2 1/8 + 3 3/8 = 5 1/2 d. 5 1/2 + 3 1/4 = 8 3/4 e. 5/8 + 2 1/4 = 2 7/8 f. 3 3/10 + 5 2/5 = 8 7/10
3) a. 2 7/10 - 1 3/10 = 1 2/5 b. 3 5/8 - 2 3/8 = 1 1/4 c. 1 5/6 - 1/6 = 1 2/3 d. 3 7/10 - 1 1/2 = 2 1/5 e. 4 3/5 - 2 = 2 3/5 f. 1 3/8 - 1 1/8 = 1/4