\[\boxed{\mathbf{745\ (745)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ ( + 7) + ( - 10) = 7 + ( - 10)\]
\[\textbf{б)}\ ( - 8) + ( - 11) = - 8 + ( - 11)\]
\[\textbf{в)}\ ( - 5) + ( + 12) = - 5 + 12\]
\[\textbf{г)}\ ( + 6) + ( + 18) = 6 + 18\]
\[\textbf{д)}\ ( + 3) + ( - 1) + ( - 15) = 3 + ( - 1) + ( - 15)\]
\[\textbf{е)}\ ( - 8) + ( + 12) + ( - 4) = - 8 + 12 + ( - 4)\]