Ответ:
а) \(\frac{1}{8}+\frac{11}{12}=\frac{3}{24}+\frac{22}{24}=\frac{25}{24}=1\frac{1}{24}\).
б) \(\frac{7}{12}-\frac{7}{15}=\frac{35}{60}-\frac{28}{60}=\frac{7}{60}\).
в) \(\frac{15}{22}\cdot\frac{33}{40}=\frac{9}{16}\).
г) \(7\frac{1}{3}:1\frac{7}{15}=\frac{22}{3}:\frac{22}{15}=\frac{22}{3}\cdot\frac{15}{22}=5\).
Ответ: а) \(1\frac{1}{24}\); б) \(\frac{7}{60}\); в) \(\frac{9}{16}\); г) \(5\).
