г)$$3\frac{1}{4}-1\frac{5}{6}$$

г) $$3\frac{1}{4}-1\frac{5}{6} = \frac{13}{4} - \frac{11}{6} = \frac{13 \cdot 3 - 11 \cdot 2}{12} = \frac{39 - 22}{12} = \frac{17}{12} = 1\frac{5}{12}$$

Ответ: $$1\frac{5}{12}$$