a) \(\frac{1}{6} + \frac{3}{7} = \frac{7}{42} + \frac{18}{42} = \frac{25}{42}\)
б) \(\frac{3}{8} + \frac{7}{16} = \frac{6}{16} + \frac{7}{16} = \frac{13}{16}\)
в) \(\frac{7}{15} - \frac{3}{20} = \frac{28}{60} - \frac{9}{60} = \frac{19}{60}\)
г) \(\frac{1}{8} + \frac{5}{6} - \frac{7}{12} = \frac{3}{24} + \frac{20}{24} - \frac{14}{24} = \frac{9}{24} = \frac{3}{8}\)
Ответ: а) \(\frac{25}{42}\), б) \(\frac{13}{16}\), в) \(\frac{19}{60}\), г) \(\frac{3}{8}\)
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