Question

[Nguyễn Hải Băng]

Thực hiện phép tính :

a, 5/9 : ( 1/11 - 5/22 ) + 5/9 : ( 1/15 - 2/3 )

Answer 1

[Edowa Conan]

a)\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

\(=\frac{5}{9}:\left[\left(\frac{1}{11}-\frac{5}{22}\right)+\left(\frac{1}{15}-\frac{2}{3}\right)\right]\)

\(=\frac{5}{9}:\left[-\frac{3}{22}+-\frac{3}{5}\right]\)

\(=\frac{5}{9}:\frac{-81}{110}\)

\(=\frac{-550}{729}\)