Ответ: 3) 1,26⋅(-10)=-12,6 4) -\(\frac{5}{12}\)⋅2\(\frac{2}{3}\)-4\(\frac{2}{6}\)⋅(-\(\frac{1}{6}\))= -8\(\frac{14}{18}\)
Решение:
3) 1,26⋅(-10)=-12,6
4) -\(\frac{5}{12}\)⋅2\(\frac{2}{3}\)-4\(\frac{2}{6}\)⋅(-\(\frac{1}{6}\))=
1) -\(\frac{5}{12}\)⋅2\(\frac{2}{3}\) = -\(\frac{5}{12}\)⋅\(\frac{8}{3}\) = -\(\frac{10}{9}\) = -1\(\frac{1}{9}\)
2) -1\(\frac{1}{9}\) - 4\(\frac{2}{6}\) = -\(\frac{10}{9}\) - \(\frac{26}{6}\) = -8 + (\(\frac{-2}{18}\) - \(\frac{6}{18}\)) = -8\(\frac{4}{9}\) = -8\(\frac{8}{18}\)
3) 4\(\frac{2}{6}\)⋅(-\(\frac{1}{6}\)) = \(\frac{26}{6}\)⋅(-\(\frac{1}{6}\)) = \(\frac{38}{24}\) = 1\(\frac{14}{24}\)
Ответ: 3) 1,26⋅(-10)=-12,6 4) -\(\frac{5}{12}\)⋅2\(\frac{2}{3}\)-4\(\frac{2}{6}\)⋅(-\(\frac{1}{6}\))= -8\(\frac{14}{18}\)