Решебник по математике 6 класс Ерина Виленкин рабочая тетрадь Часть 1, 2 Часть 2 | Страница 34

\[Стр.\ 34.\]

\[\boxed{\mathbf{5.}}\]

\[\textbf{а)} - 13 + ( - 7) + ( - 20) = - 40\]

\[\textbf{б)}\ 40 + ( - 50) + ( - 50) = - 60\]

\[\textbf{в)} - 200 + ( - 320) + ( - 80) =\]

\[= - 600\]

\[\textbf{г)} - 15 + ( - 15) + ( - 47) = - 77\]

\[\textbf{д)} - 4 + ( - 37) + ( - 6) = - 47\]

\[\textbf{е)} - 100 + ( - 240) + ( - 160) =\]

\[= - 500\]

\[\boxed{\mathbf{6.}}\]

\[\textbf{а)} - 14 + ( - 7) > - 40\]

\[\textbf{б)} - 26 + ( - 14) < - 5\]

\[\textbf{в)} - 1 + ( - 8) < - 1\]

\[\textbf{г)} - 16 + ( - 37) > - 100\]

\[\boxed{\mathbf{7.}}\]

\[x = - 3:\]

\[- 20 + x = - 20 + ( - 3) = - 23.\]

\[a = - 6:\]

\[a + ( - 26) = - 6 + ( - 26) =\]

\[= - 32.\]

\[b = - 8,7:\]

\[- 16,3 + b = - 16,3 + ( - 8,7) =\]

\[= - 25.\]

\[c = - 3\frac{5}{7}:\]

\[c + \left( - 10\frac{1}{7} \right) =\]

\[= - 3\frac{5}{7} + \left( - 10\frac{1}{7} \right) = - 13\frac{6}{7}.\]