2) Выполните вычитание чисел: а) 7 5/11 − 3; 8 5/9 − 2/9; 6 2/5 − 2/5; 1 − 3/14; 7 − 5/17; 12 11/20 − 5 7/20.

1. \(7\frac{5}{11}-3=4\frac{5}{11}\).
2. \(8\frac{5}{9}-\frac{2}{9}=8\frac{3}{9}=8\frac{1}{3}\).
3. \(6\frac{2}{5}-\frac{2}{5}=6\).
4. \(1-\frac{3}{14}=\frac{11}{14}\).
5. \(7-\frac{5}{17}=6\frac{12}{17}\).
6. \(12\frac{11}{20}-5\frac{7}{20}=7\frac{4}{20}=7\frac{1}{5}\).

Ответ: \(4\frac{5}{11};\ 8\frac{1}{3};\ 6;\ \frac{11}{14};\ 6\frac{12}{17};\ 7\frac{1}{5}\).