Question

Математика, 7 класс.
С решением, пожалуйста​
Дам 20 б

Answer 1

Ответ:

вот......................................

Пошаговое объяснение:

Answer 2

$\displaystyle \frac{5}{4} +\bigg(-7\frac{3}{4}+ \frac{7}{4}\times2 \frac{2}{7}\bigg)\div \frac{5}{9} =\\\\=\frac{5}{4} +\bigg(-\frac{31}{4}+ \frac{7}{4}\times \frac{16}{7}\bigg)\div \frac{5}{9}$

$\displaystyle 1) \frac{7}{4} \times\frac{16}{7} =4\\\\2)-\frac{31}{4} +4=-\frac{31}{4} +\frac{16}{4} =-\frac{15}{4} \\\\3) -\frac{15}{4} \div\frac{5}{9} =-\frac{15}{4} \times \frac{9}{5} =-\frac{27}{4} \\\\4) \frac{5}{4} -\frac{27}{4} =-\frac{22}{4} =-5\frac{2}{4} =-5\frac{1}{2}$

$\displaystyle \frac{5}{4} +\bigg(-7\frac{3}{4}+ \frac{7}{4}\times2 \frac{2}{7}\bigg)\div \frac{5}{9} =-5\frac{1}{2}$