Ответ:

а) \(\frac{7}{8}+1\frac{3}{8}=1\frac{10}{8}=2\frac{2}{8}=2\frac{1}{4}\).

б) \(5\frac{11}{14}-2\frac{2}{7}=5\frac{11}{14}-2\frac{4}{14}=3\frac{7}{14}=3\frac{1}{2}\).

в) \(\frac{5}{6}:\frac{1}{3}=\frac{5}{6}\cdot3=\frac{15}{6}=2\frac{1}{2}\).

г) \(\frac{4}{17}\cdot\frac{51}{44}\cdot\frac{1}{3}=\frac{4\cdot51}{17\cdot44\cdot3}=\frac{1}{11}\).

Ответ: а) \(2\frac{1}{4}\); б) \(3\frac{1}{2}\); в) \(2\frac{1}{2}\); г) \(\frac{1}{11}\).