Question

Вычислите: 2,25 * (9 11/18 - 7,5) - 8 1/3 : 3 1/3 = ?

Answer 1

Ответ:

2,25

Пошаговое объяснение:

$2,25*(9\frac{11}{18}-7,5)-8\frac{1}{3}:3\frac{1}{3}=2,25\\\\\\1)9\frac{11}{18}-7,5=9\frac{11}{18}-7\frac{9}{18}=2\frac{2}{18}=2\frac{1}{9} \\\\2)2,25*2\frac{1}{9}=\frac{225}{100}*\frac{19}{9}=\frac{9}{4}*\frac{19}{9}=\frac{19}{4}\\\\3)8\frac{1}{3}:3\frac{1}{3}=\frac{25}{3}:\frac{10}{3}=\frac{25}{3}*\frac{3}{10}=\frac{25}{10}=\frac{5}{2}$

$4)\frac{19}{4}-\frac{5}{2}=\frac{19}{4}-\frac{10}{4}=\frac{19-10}{4}=\frac{9}{4}=2\frac{1}{4}=2,25$