a) \(\frac{1}{2} + \frac{5}{8}\) г) \(\frac{5}{7} - \frac{3}{14}\) ж) \(\frac{5}{6} + \frac{3}{8}\)

Решение:

а) \( \frac{1}{2} + \frac{5}{8} = \frac{4}{8} + \frac{5}{8} = \frac{9}{8} \)

г) \( \frac{5}{7} - \frac{3}{14} = \frac{10}{14} - \frac{3}{14} = \frac{7}{14} = \frac{1}{2} \)

ж) \( \frac{5}{6} + \frac{3}{8} = \frac{20}{24} + \frac{9}{24} = \frac{29}{24} \)

Ответ: а) \(\frac{9}{8}\), г) \(\frac{1}{2}\), ж) \(\frac{29}{24}\).