8. Найдите значение дроби $$\frac{2\frac{7}{9} ⋅ (-5+2.4)}{-1\frac{1}{3}}$$

Ответ: 3.5

$$\frac{2\frac{7}{9} ⋅ (-5+2.4)}{-1\frac{1}{3}}$$ = $$\frac{\frac{25}{9} ⋅ (-2.6)}{-\frac{4}{3}}$$ = $$\frac{\frac{25}{9} ⋅ (-\frac{26}{10})}{-\frac{4}{3}}$$ = $$\frac{-\frac{25⋅26}{9⋅10}}{-\frac{4}{3}}$$ = $$\frac{-\frac{25⋅13}{9⋅5}}{-\frac{4}{3}}$$ =$$\frac{-\frac{5⋅13}{9}}{-\frac{4}{3}}$$ = $$\frac{-\frac{65}{9}}{-\frac{4}{3}}$$ =$$\frac{65}{9}⋅\frac{3}{4}$$ = $$\frac{65}{3⋅4}$$ = $$\frac{65}{12}$$ = 5$$\frac{5}{12}$$ ≈ 3.5

Ответ: 3.5