Вычислите: и) 11/2 − 3/8; к) 5/9 − 11/6; м) 7/8 − 5/6; н) 1/4 − 1/5.

1. \(\frac{11}{2}-\frac{3}{8}=\frac{44}{8}-\frac{3}{8}=\frac{41}{8}=5\frac{1}{8}\).
2. \(\frac{5}{9}-\frac{11}{6}=\frac{10}{18}-\frac{33}{18}=-\frac{23}{18}=-1\frac{5}{18}\).
3. \(\frac{7}{8}-\frac{5}{6}=\frac{21}{24}-\frac{20}{24}=\frac{1}{24}\).
4. \(\frac{1}{4}-\frac{1}{5}=\frac{5}{20}-\frac{4}{20}=\frac{1}{20}\).

Ответ: и) \(\frac{41}{8}\); к) \(-\frac{23}{18}\); м) \(\frac{1}{24}\); н) \(\frac{1}{20}\).