ГДЗ по математике 6 класс Дорофеев Задание 761

\[\boxed{\mathbf{761\ (761)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[\textbf{а)}\ 4 - ( - 7) = 4 + \left( - ( - 7) \right) = 4 + 7 = 11\]

\[\textbf{б)}\ 18 - ( - 5) = 18 + ( + 5) = 23\]

\[\textbf{в)} - 21 - ( - 20) = - 21 + ( + 20) = - 1\]

\[\textbf{г)} - 7 - ( - 9) = - 7 + ( + 9) = 2\]

\[\textbf{д)} - 30 - ( - 30) = - 30 + ( + 30) = 0\]

\[\textbf{е)} - 17 - ( - 2) = - 17 + ( + 2) = - 15\]

\[\textbf{ж)}\ 3 - ( - 3) = 3 + ( + 3) = 6\]

\[\textbf{з)} - 31 - ( - 62) = - 31 + ( + 62) = 31\]