2. Выполните действия: 8 1/2 − 2 8/9; 6 1/5 + 2 4/7; 4 2/3 − 2 2/9; 4 2/3 + 2 1/4 − 1 1/6.

1. \(8\frac{1}{2}-2\frac{8}{9}=\frac{17}{2}-\frac{26}{9}=\frac{153}{18}-\frac{52}{18}=\frac{101}{18}=5\frac{11}{18}\).

2. \(6\frac{1}{5}+2\frac{4}{7}=\frac{31}{5}+\frac{18}{7}=\frac{217}{35}+\frac{90}{35}=\frac{307}{35}=8\frac{27}{35}\).

3. \(4\frac{2}{3}-2\frac{2}{9}=\frac{14}{3}-\frac{20}{9}=\frac{42}{9}-\frac{20}{9}=\frac{22}{9}=2\frac{4}{9}\).

4. \(4\frac{2}{3}+2\frac{1}{4}-1\frac{1}{6}=\frac{14}{3}+\frac{9}{4}-\frac{7}{6}=\frac{56}{12}+\frac{27}{12}-\frac{14}{12}=\frac{69}{12}=5\frac{3}{4}\).

Ответ: 1) \(5\frac{11}{18}\); 2) \(8\frac{27}{35}\); 3) \(2\frac{4}{9}\); 4) \(5\frac{3}{4}\).