Ответ:
а) \(2\frac{1}{3}+3\frac{5}{6}−1\frac{1}{2}=\frac{14}{6}+\frac{23}{6}−\frac{9}{6}=\frac{28}{6}=4\frac{2}{3}\).
б) \(5\frac{3}{4}−2\frac{2}{3}+1\frac{5}{12}=\frac{69}{12}−\frac{32}{12}+\frac{17}{12}=\frac{54}{12}=4\frac{1}{2}\).
в) \(1\frac{2}{5}\cdot2\frac{1}{2}:\frac{7}{10}=\frac{12}{5}\cdot\frac{5}{2}\cdot\frac{10}{7}=\frac{60}{7}=8\frac{4}{7}\).
г) \(4\frac{2}{3}:1\frac{1}{6}\cdot\frac{3}{8}=\frac{14}{3}:\frac{7}{6}\cdot\frac{3}{8}=4\cdot\frac{3}{8}=\frac{3}{2}=1\frac{1}{2}\).
Ответ: а) \(4\frac{2}{3}\); б) \(4\frac{1}{2}\); в) \(8\frac{4}{7}\); г) \(1\frac{1}{2}\).
