-3 1/2+(-6 2/5-7 1/3)
- 3 1/2 + (- 6 2/5 - 7 1/3) = - 17 7/30 1) - 6 2/5 - 7 1/3 = - 6 6/15 - 7 5/15 = - 13 11/15 2) - 3 1/2 - 13 11/15 = - 3 15/30 - 13 22/30 = - 16 37/30 = - 17 7/30