\[\boxed{\mathbf{743\ (743)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ ( - 13) + ( + 22) = + 9\]
\[\textbf{б)}\ ( + 12) + ( - 17) = - 5\]
\[\textbf{в)}\ ( - 19) + 0 = - 19\]
\[\textbf{г)}\ ( - 17) + ( - 30) = - 47\]