8) -29+17 1/8;

8) $$-29 + 17 \frac{1}{8} = -29 + \frac{137}{8} = \frac{-29 \cdot 8}{8} + \frac{137}{8} = \frac{-232}{8} + \frac{137}{8} = \frac{-232 + 137}{8} = \frac{-95}{8} = -11 \frac{7}{8}$$

Ответ: $$-11 \frac{7}{8}$$