Ответ:
а) \(1\frac{5}{6}+2\frac{2}{3}=1\frac{5}{6}+2\frac{4}{6}=4\frac{1}{2}\).
б) \(9\frac{1}{6}-5\frac{3}{4}=\frac{55}{6}-\frac{23}{4}=\frac{110-69}{12}=\frac{41}{12}=3\frac{5}{12}\).
в) \(3\frac{2}{3}\cdot1\frac{1}{8}=\frac{11}{3}\cdot\frac{9}{8}=\frac{33}{8}=4\frac{1}{8}\).
г) \(6\frac{5}{7}:2\frac{6}{7}=\frac{47}{7}:\frac{20}{7}=\frac{47}{7}\cdot\frac{7}{20}=\frac{47}{20}=2\frac{7}{20}\).
Ответ: а) 4 1/2; б) 3 5/12; в) 4 1/8; г) 2 7/20.
