\[\boxed{\mathbf{776\ (776)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{14}{93} + 5 = 5\frac{14}{93}\]
\[2)\ 6\frac{17}{41} + 7\frac{19}{41} =\]
\[= (6 + 7) + \left( \frac{17}{41} + \frac{19}{41} \right) =\]
\[= 13 + \frac{36}{41} = 13\frac{36}{41}\]
\[3)\ 24\frac{9}{38} - 17\frac{5}{38} =\]
\[= (24 - 17) + \left( \frac{9}{38} - \frac{5}{38} \right) =\]
\[= 7 + \frac{4}{38} = 7\frac{4}{38}\]
\[4)\ 15\frac{7}{10} - 2\frac{4}{10} + 6\frac{1}{10} =\]
\[= 19 + \frac{4}{10} = 19\frac{4}{10}\]
\[\boxed{\ \mathbf{776}.\ }\]
\[Площадь\ поверхности\ куба:\]
\[6 \cdot 9 = 54\ см^{2}.\]