\[\boxed{\mathbf{2.}\mathbf{382}}\]
Пояснение.
Решение.
\[\textbf{а)}\ \left( \frac{4}{9} + \frac{7}{36} \right) \cdot 36 =\]
\[= \frac{4}{9} \cdot 36 + \frac{7}{36} \cdot 36 = 16 + 7 =\]
\[= 23\]
\[\textbf{б)}\ \left( \frac{17}{18} - \frac{5}{6} \right) \cdot 18 =\]
\[= \frac{17}{18} \cdot 18 - \frac{5}{6} \cdot 18 = 17 - 15 =\]
\[= 2\]
\[\textbf{в)}\ \left( \frac{5}{12} + \frac{11}{18} \right) \cdot 36 =\]
\[= \frac{5}{12} \cdot 36 + \frac{11}{18} \cdot 36 = 15 + 22 =\]
\[= 37\]
\[\textbf{г)}\ \left( \frac{10}{11} - \frac{19}{33} \right) \cdot 66 =\]
\[= \frac{10}{11} \cdot 66 - \frac{19}{33} \cdot 66 = 60 - 38 =\]
\[= 22\]
\[\textbf{д)}\ \left( \frac{15}{24} + \frac{7}{36} \right) \cdot 12 =\]
\[= \frac{15}{24} \cdot 12 + \frac{7}{36} \cdot 12 = \frac{15}{2} + \frac{7}{3} =\]
\[= 7\frac{1}{2} + 2\frac{1}{3} = 7\frac{3}{6} + 2\frac{2}{6} = 9\frac{5}{6}\]
\[\textbf{е)}\ \left( \frac{25}{26} - \frac{27}{65} \right) \cdot 91 =\]
\[= \frac{25}{26} \cdot 91 - \frac{27}{65} \cdot 91 =\]
\[= \frac{25 \cdot 7}{2} - \frac{27 \cdot 7}{5} =\]
\[= \frac{175}{2} - \frac{189}{5} = 87\frac{1}{2} - 37\frac{4}{5} =\]
\[= 87\frac{5}{10} - 37\frac{8}{10} =\]
\[= 86\frac{15}{10} - 37\frac{8}{10} = 49\frac{7}{10} = 49,7\ \]