\[\boxed{\mathbf{532\ (532).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
Решение.
\[3)\ 1800\ :\frac{2}{3} = \frac{1800 \cdot 3}{2} =\]
\[= 900 \cdot 3 = 2700\ (м) - высота\ \]
\[горы.\]
\[Ответ:2700\ м.\]
\[\boxed{\mathbf{5}\mathbf{32}}\]
\[1)\ \frac{5}{16}\ :1,25 \cdot 0,36\ :1\frac{4}{5} =\]
\[= \frac{5}{16}\ :\frac{125}{100} \cdot \frac{36}{100}\ :\frac{9}{5} =\]
\[= \frac{5}{16} \cdot \frac{100}{25} \cdot \frac{36}{100} \cdot \frac{5}{9} =\]
\[2)\ \frac{7}{8}\ :\left( 0,75 \cdot \frac{14}{15}\ :1,2 \right) =\]
\[= \frac{7}{8}\ :\left( \frac{75}{100} \cdot \frac{14}{15}\ :\frac{12}{10} \right) =\]
\[= \frac{7}{8}\ :\left( \frac{75}{100} \cdot \frac{14}{15} \cdot \frac{10}{12} \right) =\]