1 5 -- + -- = 6 12

$$\frac{1}{6} + \frac{5}{12} = \frac{1 \cdot 2}{6 \cdot 2} + \frac{5}{12} = \frac{2}{12} + \frac{5}{12} = \frac{7}{12}$$

Ответ: $$\frac{7}{12}$$