5.504 Выполните действия: a) \(\frac{1}{4} + \frac{1}{7}\) b) \(\frac{1}{4} - \frac{1}{5}\) c) \(\frac{1}{2} - \frac{3}{8}\) d) \(4 + \frac{4}{7}\) e) \(\frac{1}{3} - \frac{1}{5}\) f) \(\frac{3}{4} + \frac{5}{6}\)

a) \(\frac{1}{4} + \frac{1}{7} = \frac{7}{28} + \frac{4}{28} = \frac{11}{28}\) b) \(\frac{1}{4} - \frac{1}{5} = \frac{5}{20} - \frac{4}{20} = \frac{1}{20}\) c) \(\frac{1}{2} - \frac{3}{8} = \frac{4}{8} - \frac{3}{8} = \frac{1}{8}\) d) \(4 + \frac{4}{7} = \frac{28}{7} + \frac{4}{7} = \frac{32}{7} = 4\frac{4}{7}\) e) \(\frac{1}{3} - \frac{1}{5} = \frac{5}{15} - \frac{3}{15} = \frac{2}{15}\) f) \(\frac{3}{4} + \frac{5}{6} = \frac{9}{12} + \frac{10}{12} = \frac{19}{12} = 1\frac{7}{12}\)