Question

Помогите решить пример -7 2/3+5 4/5÷2 4/5+1,5

Answer 1

Ответ:

$-4frac{2}{21}$

Объяснение:

$-7frac{2}{3}+5frac{4}{5}:2frac{4}{5}+1,5=-4frac{2}{21}\\1) 5frac{4}{5}:2frac{4}{5}=frac{29}{5}:frac{14}{5}= frac{29}{5}*frac{5}{14}=frac{29*5}{5*14}=frac{29}{14}=2frac{1}{14}$

$2)-7frac{2}{3}+2frac{1}{14}=(-7+2)+(-frac{2^{(14}}{3}+frac{1^{(3}}{14})=-5+(-frac{28}{42}+frac{3}{42})=-5-frac{25}{42}=-5frac{25}{42}\\3)-5frac{25}{42}+1,5=-5frac{25}{42}+1frac{1}{2}=(-5+1)+(-frac{25}{42}+frac{1^{(21}}{2} )=-4+(-frac{25}{42}+frac{21}{42} )=-4-frac{4}{42}=-4frac{2}{21}$