ГДЗ по математике 6 класс Дорофеев Задание 931

\[\boxed{\mathbf{931\ (931)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[\textbf{а)}\ ( - 10) \bullet ( - 0,1) \bullet ( - 2,5) = - (10 \bullet 0,1 \bullet 2,5) = - (1 \bullet 2,5) = - 2,5\]

\[\textbf{б)}\ \left( - \frac{1}{2} \right) \bullet \left( - \frac{2}{3} \right) \bullet \left( - \frac{3}{4} \right) = - \left( \frac{1}{2} \bullet \frac{2}{3} \bullet \frac{3}{4} \right) = - \left( \frac{1 \bullet 2 \bullet 3}{2 \bullet 3 \bullet 4} \right) = - \frac{1}{4}\]

\[\textbf{в)}\ ( - 1) \bullet ( - 3,7) \bullet 10 = + (1 \bullet 3,7 \bullet 10) = 37\]

\[\textbf{г)} - \frac{1}{2} \bullet 2 \bullet \frac{1}{3} = - \left( \frac{1}{2} \bullet 2 \bullet \frac{1}{3} \right) = - \left( \frac{1}{2} \bullet \frac{2}{1} \bullet \frac{1}{3} \right) = - \left( \frac{1 \bullet 2 \bullet 1}{2 \bullet 1 \bullet 3} \right) = - \frac{1}{3}\]