Question

Найдите значение алгебраического выражения (-2 18/25)x+y:1 1/6-99z при x=-4 4/17, y=-25 2/3, z=-0,02

Answer 1

$( - 2 frac{18}{25}) times ( - 4) + ( - 25 frac{2}{3} ) div 1 frac{1}{6} \ - 99 times ( - 0.02) = - 9.14$
$1)( - 2 frac{18}{25} ) times ( - 4) = frac{68}{25} times 4 = \ = frac{272}{25} = 10 frac{22}{25}$
$2)( - 25 frac{2}{3} ) div 1 frac{1}{6} = - frac{77}{3} div frac{7}{6} = \ - frac{77}{3} times frac{6}{7} = - 11 times 2 = - 22$
$3) - 99 times ( - 0.02) = 1.98$
$4)10 frac{22}{25} - 22 = 10 frac{22}{25} - 21 frac{25}{25} = \ - 11 frac{3}{25}$
$5) - 11 frac{3}{25} + 1.98 \ = - 11.12 + 1.98 = - 9.14$