\[\boxed{\mathbf{747\ (747)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)} - 5 + ( - 10) = - 15\]
\[\textbf{б)} - 3 + ( - 4) = - 7\]
\[\textbf{в)} - 20 + ( - 6) = - 26\]
\[\textbf{г)}\ 100 + ( - 200) = - 100\]
\[\textbf{д)}\ 80 + ( - 20) = 60\]
\[\textbf{е)} - 8 + 8 = 0\]
\[\textbf{ж)} - 150 + 100 = - 50\]
\[\textbf{з)} - 36 + 20 = - 16\]