Question

Помогите пожалуйста

Answer 1

$9 frac{1}{4} *8- 5frac{1}{2} - 2frac{4}{5} * 2frac{11}{12} = frac{37}{4} * 8- frac{5}{3} * frac{11}{2} - frac{14}{5} * frac{35}{12} = 37*2- frac{55}{6} -$
$7* frac{7}{6} =74- frac{55}{6} - frac{49}{6} = frac{444-55-49}{6} = frac{340}{6} = frac{170}{3} = 56 frac{2}{3}$