\[\boxed{\mathbf{746\ (746)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ 7 + ( - 3) = ( - 3) + 7 = - 3 + 7\]
\[\textbf{б)} - 4 + ( - 2) = - 2 + ( - 4)\]
\[\textbf{в)} - 10 + 5 = 5 + ( - 10)\]
\[\textbf{г)} - 1 + 8 = 8 + ( - 1)\]