\[\boxed{\ \mathbf{928\ (928)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 1,3 \cdot 0,2a = 0,26a\]
\[2)\ 0,9b \cdot 8 = 7,2b\]
\[3)\ 0,23 \cdot 40b = 9,20b = 9,2b\]
\[4)\ 208 \cdot y \cdot 0,5 = 1,4y\]
\[5)\ 0,6a \cdot 0,08b = 0,048ab\]
\[6)\ 1,1x \cdot 1,4y = 1,54xy\]
\[7)\ 0,27m \cdot 0,3 = 0,081m\]
\[8)\ 0,4a \cdot 8 \cdot b \cdot 0,3c =\]
\[= 3,2ab \cdot 0,3c = 0,96abc\]
\[9)\ 1,2x \cdot 0,3y \cdot 5z =\]
\[= 1,2x \cdot 1,5yz = 1,8xyz\]
\[\boxed{\mathbf{928}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ а)\ n < \frac{123}{30}\ \ \ при\ n = 4;\ \ \]
\[так\ как\ \ \frac{123}{30} = \frac{120 + 3}{30} = 4\frac{3}{30}.\]
\[\textbf{б)}\ n < \frac{198}{15}\ при\ n = 13;\ \ \]
\[так\ как\ \frac{198}{15} = \frac{195 + 3}{15} = 13\frac{3}{15}.\]
\[2)\ а)\ m > \frac{13}{5}\text{\ \ }при\ m = 3;\ \ \]
\[так\ как\ \ \ \frac{13}{5} = \frac{10 + 3}{5} = 2\frac{3}{5}.\]
\[\textbf{б)}\ \frac{275}{10} > m\ \ при\ m = 27;\ \ \]
\[так\ как\ \ \frac{275}{10} = \frac{270 + 5}{10} = 27\frac{5}{10}.\]