Question

Это дробь - /
-(+7/15)+(+4/9)+(-28/45)-(2/3)

Answer 1

$- frac{7}{15}+ frac{4}{9}+ frac{-28}{45}- frac{2}{3}= - frac{7cdot 3}{15cdot 3}+ frac{4cdot 5}{9cdot 5}+ frac{-28}{45}- frac{2cdot 15}{3cdot 15}= \ = frac{-21+20-28-30}{45} =- frac{59}{45}=-1 frac{14}{45}$