Вычислите: (5/12)/(2/3+1/6).

Ответ:

\[\frac{\frac{5}{12}}{\frac{2}{3} + \frac{1}{6}} = \frac{\frac{5}{12}}{\frac{4 + 1}{6}} = \frac{5}{12}\ :\frac{5}{6} = \frac{5 \cdot 6}{12 \cdot 5} = \frac{1}{2}\]