\[\boxed{\mathbf{1034\ (1025)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 16 \cdot ( - 3) = - 48\]
\[2) - 8 \cdot ( - 7) = 56\]
\[3) - 2,3 \cdot ( - 1,4) = 3,22\]
\[4)\ \frac{6}{7} \cdot \left( - \frac{4}{7} \right) = - \frac{6 \cdot 4}{7 \cdot 7} = - \frac{24}{49}\]
\[5) - \frac{4}{7} \cdot \frac{7}{9} = - \frac{4 \cdot 7}{7 \cdot 9} = - \frac{4}{9}\]