Ответ:
а) Приведём дроби к знаменателю 24: \(\frac{5}{8}+\frac{7}{12}=\frac{15}{24}+\frac{14}{24}=\frac{29}{24}=1\frac{5}{24}\).
б) \(5\frac{1}{6}-2\frac{3}{4}=\frac{31}{6}-\frac{11}{4}=\frac{62}{12}-\frac{33}{12}=\frac{29}{12}=2\frac{5}{12}\).
в) \(\frac{9}{20}\cdot\frac{8}{27}=\frac{2}{15}\).
г) \(3\frac{3}{5}:2\frac{2}{15}=\frac{18}{5}:\frac{32}{15}=\frac{18}{5}\cdot\frac{15}{32}=\frac{27}{16}=1\frac{11}{16}\).
Ответ: а) \(1\frac{5}{24}\); б) \(2\frac{5}{12}\); в) \(\frac{2}{15}\); г) \(1\frac{11}{16}\).
