\[\boxed{Страница\ 69.}\]
\[\boxed{\mathbf{6.}}\]
\[5\% = \frac{5}{100}\]
\[16\% = \frac{16}{100}\]
\[28\% = \frac{28}{100}\]
\[47\% = \frac{47}{100}\]
\[64\% = \frac{64}{100}\]
\[83\% = \frac{83}{100}\]
\[\boxed{\mathbf{7.}}\]
\[\frac{4}{100} = 4\%\]
\[\frac{7}{100} = 7\%\]
\[\frac{12}{100} = 12\%\]
\[\frac{36}{100} = 36\%\]
\[\frac{58}{100} = 58\%\]
\[\frac{99}{100} = 99\%\]
\[\boxed{\mathbf{8.}}\]
\[\textbf{а)}\ \frac{1}{6} > \frac{1}{18};\ \ так\ как\ 6 < 18\]
\[\textbf{б)}\ \frac{1}{54} < \frac{1}{32};\ \ так\ как\ \ 54 > 32\]
\[\boxed{\mathbf{9.}}\]
\[\textbf{а)}\ 58\ 380\ :x + 237 = 1071\]
\[58\ 380\ :x = 1071 - 237\]
\[58\ 380\ :x = 834\]
\[x = 58\ 380\ :834\]
\[x = 70.\]
\[\textbf{б)}\ \ 274\ 512\ :(750 - x) = 456\]
\[750 - x = 274\ 512\ :456\]
\[750 - x = 602\]
\[x = 750 - 602\]
\[x = 148.\]
\[\boxed{\mathbf{10.}}\]
\[128\ :2 = 64\ (г) - масса\ той\ \]
\[половины\ конструкции,\ где\ \]
\[висит\ звездочка.\]
\[64\ :4 = 16\ (г) - масса\ \]
\[звездочки.\]
\[Ответ:D.\ 16\ г.\]