Question

Парни и Девчонки помогите плз даю 100​

Answer 1

Ответ:

Будет $\boxed{-35\frac{2361}{4785} }$

Пошаговое объяснение:

$1\frac{2}{5} \div12\frac{3}{7} -3\frac{1}{3} \times(14\frac{2}{11} -3\frac{1}{2} )=\\ \\ =\frac{1\times5+2}{5} \div\frac{12\times7+3}{7} -\frac{3\times3+1}{3} \times(\frac{14\times11+2}{11} -\frac{3\times2+1}{2} )=\\ \\ =\frac{5+2}{5} \div\frac{84+3}{7} -\frac{9+1}{3} \times(\frac{154+2}{11} -\frac{6+1}{2} )=\\ \\ =\frac{7}{5} \div\frac{87}{7} -\frac{10}{3} \times(\frac{156}{11} -\frac{7}{2} )=$

$=\frac{7}{5} \times\frac{7}{87} -\frac{10}{3} \times(\frac{156\times2}{11\times2} -\frac{7\times11}{2\times11} )=\\ \\ =\frac{7\times7}{5\times87} -\frac{10}{3} \times(\frac{312}{22} -\frac{77}{22} )=\\ \\ =\frac{49}{435} -\frac{10}{3} \times\frac{312-77}{22} =\frac{49}{435} -\frac{10}{3} \times\frac{235}{22} =\\ \\ =\frac{49}{435} -\frac{5}{3} \times\frac{235}{11} =\frac{49}{435} -\frac{5\times235}{3\times11} =$

$=\frac{49}{435} -\frac{1175}{33} =\frac{49\times11}{435\times11} -\frac{1175\times145}{33\times145}=\\ \\ =\frac{539}{4785} -\frac{170375}{4785} =\frac{539-170375}{4785} =\\ \\ =-\frac{169836}{4785} =-35\frac{2361}{4785}$