Разбираемся:
1) \(\frac{1}{5} - \frac{1}{2} = \frac{2}{10} - \frac{5}{10} = -\frac{3}{10}\)
2) \(\frac{1}{9} - \frac{1}{3} = \frac{1}{9} - \frac{3}{9} = -\frac{2}{9}\)
3) \(-\frac{1}{3} + \frac{1}{6} = -\frac{2}{6} + \frac{1}{6} = -\frac{1}{6}\)
4) \(-\frac{1}{35} - \frac{1}{5} = -\frac{1}{35} - \frac{7}{35} = -\frac{8}{35}\)
Ответ: -3/10; -2/9; -1/6; -8/35