\[\boxed{\mathbf{742\ (742)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ ( + 6) + ( - 7) = - 1\]
\[\textbf{б)}\ ( - 5) + ( + 14) = + 9\]
\[\textbf{в)}\ ( - 20) + ( + 13) = - 7\]
\[\textbf{г)}\ ( - 7) + ( + 7) = 0\]
\[\textbf{д)}\ ( + 9) + ( - 14) = - 5\]
\[\textbf{е)}\ ( - 8) + ( + 11) = + 3\]
\[\textbf{ж)}\ ( + 17) + ( - 9) = + 8\]
\[\textbf{з)}\ ( + 8) + ( - 13) = - 5\]
\[\textbf{и)}\ ( - 7) + ( + 9) = + 2\]