Выполните вычитание: а) \(\frac{1}{11}-\frac{1}{33}\); б) \(\frac{7}{11}-\frac{7}{12}\); в) \(\frac{13}{30}-\frac{2}{45}\); г) \(\frac{7}{15}-\frac{2}{5}\); д) \(\frac{13}{60}-\frac{7}{40}\); е) \(\frac{11}{21}-\frac{3}{14}\).

а) \(\frac{1}{11}-\frac{1}{33}=\frac{3}{33}-\frac{1}{33}=\frac{2}{33}\).

б) \(\frac{7}{11}-\frac{7}{12}=\frac{84}{132}-\frac{77}{132}=\frac{7}{132}\).

в) \(\frac{13}{30}-\frac{2}{45}=\frac{39}{90}-\frac{4}{90}=\frac{35}{90}=\frac{7}{18}\).

г) \(\frac{7}{15}-\frac{2}{5}=\frac{7}{15}-\frac{6}{15}=\frac{1}{15}\).

д) \(\frac{13}{60}-\frac{7}{40}=\frac{26}{120}-\frac{21}{120}=\frac{5}{120}=\frac{1}{24}\).

е) \(\frac{11}{21}-\frac{3}{14}=\frac{22}{42}-\frac{9}{42}=\frac{13}{42}\).

Ответ: а) \(\frac{2}{33}\); б) \(\frac{7}{132}\); в) \(\frac{7}{18}\); г) \(\frac{1}{15}\); д) \(\frac{1}{24}\); е) \(\frac{13}{42}\).