Выполним вычисления.
а) \(\frac{3}{14} + \frac{7}{14}\)
\(\frac{3}{14} + \frac{7}{14} = \frac{3+7}{14} = \frac{10}{14} = \frac{5}{7}\)
б) \(\frac{8}{15} + \frac{7}{15}\)
\(\frac{8}{15} + \frac{7}{15} = \frac{8+7}{15} = \frac{15}{15} = 1\)
в) \(\frac{7}{14} - \frac{3}{14}\)
\(\frac{7}{14} - \frac{3}{14} = \frac{7-3}{14} = \frac{4}{14} = \frac{2}{7}\)
г) \(\frac{8}{15} - \frac{7}{15}\)
\(\frac{8}{15} - \frac{7}{15} = \frac{8-7}{15} = \frac{1}{15}\)
Ответ: а) \(\frac{5}{7}\); б) 1; в) \(\frac{2}{7}\); г) \(\frac{1}{15}\)