\[\boxed{\text{5.\ 22}}\]
\[\textbf{а)}\ 48 - 9 + 23 - 48 + 9 - 23 =\]
\[= 0\]
\[\textbf{б)}\ \frac{5}{6} + 0,7 - \frac{5}{6} + 0,3 = 1\]
\[\textbf{в)} - \frac{4}{5} \cdot \frac{9}{11} \cdot 1\frac{1}{4} = - \frac{4}{5} \cdot \frac{5}{4} \cdot \frac{9}{11} =\]
\[= - \frac{9}{11}\]
\[\textbf{г)} - \frac{7}{8} \cdot ( - 4,8) \cdot 1\frac{1}{7} \cdot ( - 10) =\]
\[= - \frac{7}{8} \cdot \frac{8}{7} \cdot 48 = - 48\]
\[\textbf{д)}\ \frac{4}{9} \cdot \frac{7}{8} + \frac{4}{9} \cdot \left( - \frac{1}{8} \right) =\]
\[= \frac{4}{9} \cdot \left( \frac{7}{8} - \frac{1}{8} \right) = \frac{4}{9} \cdot \frac{6}{8} = \frac{4}{9} \cdot \frac{3}{4} = \frac{1}{3}\]
\[\textbf{е)}\ \left( \frac{1}{3} + \frac{5}{8} \right) \cdot ( - 24) =\]
\[= \frac{1}{3} \cdot ( - 24) + \frac{5}{8} \cdot ( - 24) =\]
\[= - 6 + 5 \cdot ( - 3) =\]
\[= - 6 - 15 = - 21\]