Решебник по математике 6 класс Ерина Виленкин рабочая тетрадь Часть 1, 2 Часть 2 | Страница 42

\[Стр.\ 42.\]

\[\boxed{\mathbf{14.}}\]

\[x = - 2,8;\ \ y = 4,1:\]

\[x + y = - 2,8 + 4,1 = 1,3.\]

\[a = - 7,9;\ \ b = 2,7:\]

\[a + b = - 7,9 + 2,7 = - 5,2.\]

\[c = - \frac{7}{8};\ \ e = \frac{3}{5}:\]

\[c + e = - \frac{7}{8} + \frac{3}{5} = - \frac{35}{40} + \frac{24}{40} =\]

\[= - \frac{11}{40}.\]

\[\boxed{\mathbf{15.}}\]

\[\textbf{а)} - 8 + 3 = - 5\]

\[- 8 + ( - 2) = - 10\]

\[7 + ( - 2) = 5\]

\[\textbf{б)} - 11 + 9 = - 2\]

\[- 7 + ( - 9) = - 16\]

\[12 + ( - 9) = 3\]

\[\textbf{в)}\ 10 + ( - 10) = 0\]

\[- 12 + 12 = 0\]

\[- 14 + 14 = 0\]

\[\boxed{\mathbf{16.}}\]

\[\textbf{а)} - 425 + 500 > 0\]

\[- 425 + 425 = 0\]

\[- 252 + 187 < 0\]

\[\textbf{б)}\ 356 + ( - 700) < 0\]

\[- 391 + ( - 482) < 0\]

\[- 356 + ( - 356) < 0\]