Выполните действия (14-2 11/12:7/18):4 7/8.

Ответ:

\[\left( 14 - 2\frac{11}{12}\ :\frac{7}{18} \right)\ :4\frac{7}{8} =\]

\[= \left( 14 - \frac{35 \cdot 18}{12 \cdot 7} \right)\ :\frac{39}{8} = \left( 14 - \frac{5 \cdot 3}{2 \cdot 1} \right) \cdot \frac{8}{39} =\]

\[= \left( 14 - \frac{15}{2} \right) \cdot \frac{8}{39} = \frac{14 \cdot 8}{39} - \frac{15 \cdot 8}{2 \cdot 39} =\]

\[= \frac{112}{39} - \frac{15 \cdot 4}{1 \cdot 39} = \frac{112}{39} - \frac{60}{39} = \frac{52}{39} =\]

\[= 1\frac{13}{39} = 1\frac{1}{3}\text{.\ }\]