1. 13/5 + 8/5 = 21/5 = 4 1/5
2. 21/11 + 19/11 = 40/11 = 3 7/11
3. 13/8 + 17/8 + 15/8 = 45/8 = 5 4/8
4. 15/4 + 11/4 + 9/4 = 35/4 = 8 3/4
1. 13/5 + 8/5 = 21/5 = 4 1/5
2. 21/11 + 19/11 = 40/11 = 3 7/11
3. 13/8 + 17/8 + 15/8 = 45/8 = 5 4/8
4. 15/4 + 11/4 + 9/4 = 35/4 = 8 3/4