Question

492. Найдите значение выражения
1) (-6 2/5+3)•(3-4,5)•5/17

Answer 1

$( - 6 \frac{2}{5} + 3) \times (3 - 4.5) \times \frac{5}{17} = ( - 3 \frac{2}{5}) \times ( - 1.5) \times \frac{5}{17} = ( - \frac{17}{5} ) \times ( - 1.5 ) \times \frac{5}{17} = ( - \frac{17}{5} ) \times ( - 1.5 ) \times \frac{5}{17} = - \frac{17 \times 5}{5 \times 17} \times ( - 1.5) = - \frac{1 \times 1}{1 \times 1} \times ( - 1.5) = - 1 \times ( - 1.5) = 1.5$