3. Найдите значение выражения: 1) \(5\frac{1}{3}:\frac{8}{9}:\frac{1}{3}\); 2) \(5\frac{1}{3}:(\frac{8}{9}:\frac{1}{3})\); 3) \((8\frac{5}{7}-6\frac{5}{6}:1\frac{5}{36}):4\frac{3}{4}\); 4) \((2\frac{5}{6}+2\frac{2}{9}):3\frac{1}{4}-\frac{2}{7}:1\frac{2}{7}\).

1. \(5\frac{1}{3}:\frac{8}{9}:\frac{1}{3}=\frac{16}{3}\cdot\frac{9}{8}\cdot3=18\).
2. \(5\frac{1}{3}:(\frac{8}{9}:\frac{1}{3})=\frac{16}{3}:\frac{8}{3}=2\).
3. \(6\frac{5}{6}:1\frac{5}{36}=\frac{41}{6}:\frac{41}{36}=6\).
   \((8\frac{5}{7}-6):4\frac{3}{4}=\left(\frac{61}{7}-6\right):\frac{19}{4}=\frac{19}{7}\cdot\frac{4}{19}=\frac{4}{7}\).
4. \(2\frac{5}{6}+2\frac{2}{9}=\frac{17}{6}+\frac{20}{9}=\frac{91}{18}\).
   \(\frac{91}{18}:3\frac{1}{4}=\frac{91}{18}\cdot\frac{4}{13}=\frac{14}{9}\).
   \(\frac{2}{7}:1\frac{2}{7}=\frac{2}{7}:\frac{9}{7}=\frac{2}{9}\).
   \(\frac{14}{9}-\frac{2}{9}=\frac{4}{3}\).

Ответ: 1) 18; 2) 2; 3) \(\frac{4}{7}\); 4) \(\frac{4}{3}\).