199 Найдите сумму или разность: a) \(\frac{3}{13} + \frac{5}{13}\); б) \(\frac{1}{6} + \frac{4}{6}\); в) \(\frac{6}{17} - \frac{3}{17}\); г) \(\frac{13}{35} - \frac{7}{35}\)

a) \(\frac{3}{13} + \frac{5}{13} = \frac{3+5}{13} = \frac{8}{13}\)

б) \(\frac{1}{6} + \frac{4}{6} = \frac{1+4}{6} = \frac{5}{6}\)

в) \(\frac{6}{17} - \frac{3}{17} = \frac{6-3}{17} = \frac{3}{17}\)

г) \(\frac{13}{35} - \frac{7}{35} = \frac{13-7}{35} = \frac{6}{35}\)

Ответ: а) \(\frac{8}{13}\), б) \(\frac{5}{6}\), в) \(\frac{3}{17}\), г) \(\frac{6}{35}\)