\[\boxed{\mathbf{2.}\mathbf{209}\mathbf{.\ ОК\ ГДЗ - домашка\ на\ }5}\]
Пояснение.
Решение.
\[\textbf{а)}\ \frac{1}{6} - \left( 1 - \frac{17}{18} \right) =\]
\[= \frac{1}{6} - \left( \frac{18}{18} - \frac{17}{18} \right) = \frac{1^{\backslash 3}}{6} - \frac{1}{18} =\]
\[= \frac{3}{18} - \frac{1}{18} = \frac{2}{18} = \frac{1}{9}\]
\[\textbf{б)}\ 3 - \left( \frac{11^{\backslash 3}}{14} - \frac{13^{\backslash 2}}{21} \right) =\]
\[= 3 - \left( \frac{33}{42} - \frac{26}{42} \right) = 3 - \frac{7}{42} =\]
\[= 3 - \frac{1}{6} = 2\frac{6}{6} - \frac{1}{6} = 2\frac{5}{6}\]
\[\textbf{в)}\ 7\frac{14}{25} - \left( 3\frac{8^{\backslash 2}}{15} + 1\frac{9^{\backslash 3}}{10} \right) =\]
\[= 7\frac{14}{25} - \left( 3\frac{16}{30} + 1\frac{27}{30} \right) =\]
\[= 7\frac{14}{25} - 4\frac{43}{30} =\]
\[= 7\frac{14^{\backslash 6}}{25} - 5\frac{13^{\backslash 5}}{30} =\]
\[= 7\frac{84}{150} - 5\frac{65}{150} = 2\frac{19}{150}\]
\[\textbf{г)}\ 6\frac{3}{16} - 2\frac{5}{24} - 3\frac{11^{\backslash 2}}{12} =\]
\[= 6\frac{3}{16} - \left( 2\frac{5}{24} + 3\frac{22}{24} \right) =\]
\[= 6\frac{3}{16} - 5\frac{27}{24} = 6\frac{3}{16} - 6\frac{3}{24} =\]
\[= 6\frac{3}{16} - 6\frac{1^{\backslash 2}}{8} = 6\frac{3}{16} - 6\frac{2}{16} =\]
\[= \frac{1}{16}\]