\[\boxed{\ \mathbf{969\ (969)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 3,6\ :9 + 0,18 \cdot 5 =\]
\[= 0,4 + 0,9 = 1,3\]
\[3)\ 47,04 - 47,04\ :(46 + 38) =\]
\[= 47,04 - 47,04\ :84 = 46,48\]
\[\boxed{\mathbf{969}\mathbf{.}\mathbf{\ }}\]
\[1)\ \frac{16}{63}\ \ + \frac{12}{63} = \frac{28}{63} = \frac{4}{9}\]
\[2)\ \frac{53}{85} - \frac{19}{85} = \frac{34}{85} = \frac{2}{5}\]
\[3)\ 8\frac{34}{81} + 2\frac{38}{81} = 10\frac{72}{81} = 10\frac{8}{9}\]
\[4)\ 3\frac{49}{56} - 3\frac{17}{56} = \frac{32}{56} = \frac{4}{7}\]