\[\boxed{\mathbf{781\ (781)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ 8 \bullet ( - 5) = - 40\]
\[\textbf{б)} - 6 \bullet 4 = - 24\]
\[\textbf{в)} - 3 \bullet ( - 8) = 3 \bullet 8 = 24\]
\[\textbf{г)} - 15 \bullet ( - 6) = 15 \bullet 6 = 90\]
\[\textbf{д)}\ 11 \bullet ( - 4) = - 44\]
\[\textbf{е)} - 7 \bullet 80 = - 560\]