\[\boxed{\mathbf{387\ (387).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 0,12 = 0,12 \cdot 100\% = 12\%\]
\[2)\ 0,05 = 0,05 \cdot 100\% = 5\%\]
\[3)\ 0,5 = 0,5 \cdot 100\% = 50\%\]
\[4)\ 0,324 = 0,324 \cdot 100\% =\]
\[= 32,4\%\]
\[5)\ 0,467 = 0,467 \cdot 100\% =\]
\[= 46,7\%\]
\[6)\ 4 = 4 \cdot 100\% = 400\%\]
\[7)\ 1,12 = 1,12 \cdot 100\% = 112\%\]
\[8)\ 1\frac{1}{25} = 1\frac{4}{100} = 1,04 =\]
\[= 1,04 \cdot 100\% = 104\%\]
\[\boxed{\mathbf{387}\mathbf{.}}\]
\[1)\ 3\frac{2}{9} \cdot 2\frac{1}{5} + 2\frac{1}{5} \cdot 6\frac{7}{9} =\]
\[= 2\frac{1}{5} \cdot \left( 3\frac{2}{9} + 6\frac{7}{9} \right) = 2\frac{1}{5} \cdot 9\frac{9}{9} =\]
\[= \frac{11}{5} \cdot 10 = 11 \cdot 2 = 22\]
\[2)\ 4\frac{8}{9} \cdot 1\frac{1}{2} - 3\frac{5}{9} \cdot 1\frac{1}{2} =\]
\[= 1\frac{1}{2} \cdot \left( 4\frac{8}{9} - 3\frac{5}{9} \right) = 1\frac{1}{2} \cdot 1\frac{3}{9} =\]
\[= \frac{3}{2} \cdot \frac{12}{9} = \frac{1 \cdot 2}{1 \cdot 1} = 2\ \]