ГДЗ по математике 6 класс Дорофеев Задание 768

\[\boxed{\mathbf{768\ (768)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[\textbf{а)}\ 3 - c\]

\[c = 7 \Longrightarrow 3 - 7 = 3 + ( - 7) = - 4\]

\[c = - 5 \Longrightarrow 3 - ( - 5) = 3 + 5 = 8\]

\[\textbf{б)}\ x + 10\]

\[x = - 15 \Longrightarrow - 15 + 10 = - 5\]

\[x = - 10 \Longrightarrow - 10 + 10 = 0\]

\[\textbf{в)}\ a - b\]

\[a = 7;\ \ b = 10 \Longrightarrow 7 - 10 = 7 + ( - 10) = - 3\]

\[\textbf{г)}\ x - y\]

\[x = - 3;\ \ y = - 13 \Longrightarrow - 3 - ( - 13) = - 3 + 13 = 10\ \]