2. Найдите значение выражений: a) \(1\frac{1}{9} - \frac{2}{3}\); б) \(12\frac{3}{8} - 6\frac{7}{20}\); в) \(4\frac{5}{21} + 5\frac{3}{14}\); ж) \(9\frac{18}{35} : \frac{14}{15}\); е) \(9\frac{1}{3} - 1\frac{1}{8}\); д) \(\frac{3}{10} \cdot \frac{20}{21}\)

a) \(1\frac{1}{9} - \frac{2}{3} = \frac{10}{9} - \frac{2}{3} = \frac{10}{9} - \frac{6}{9} = \frac{4}{9}\) б) \(12\frac{3}{8} - 6\frac{7}{20} = 12\frac{15}{40} - 6\frac{14}{40} = 6\frac{1}{40}\) в) \(4\frac{5}{21} + 5\frac{3}{14} = 4\frac{10}{42} + 5\frac{9}{42} = 9\frac{19}{42}\) ж) \(9\frac{18}{35} : \frac{14}{15} = \frac{333}{35} : \frac{14}{15} = \frac{333}{35} \cdot \frac{15}{14} = \frac{333 \cdot 3}{7 \cdot 14} = \frac{999}{98} = 10\frac{19}{98}\) е) \(9\frac{1}{3} - 1\frac{1}{8} = 9\frac{8}{24} - 1\frac{3}{24} = 8\frac{5}{24}\) д) \(\frac{3}{10} \cdot \frac{20}{21} = \frac{3 \cdot 2}{1 \cdot 21} = \frac{6}{21} = \frac{2}{7}\)