Question

09/13+(-11/9)+9/-13+2/3 

Answer 1

Giúp mình zới

 

Answer 2

-5/9 <=> 0.(5)

Answer 3

Đề bài: \(\dfrac{9}{13}+\left(-\dfrac{11}{9}\right)+\dfrac{9}{-13}+\dfrac{2}{3}\)

\(=\dfrac{9}{13}-\dfrac{11}{9}-\dfrac{9}{13}+\dfrac{2}{3}\)

\(=\dfrac{9}{13}-\dfrac{11}{9}-\dfrac{9}{13}+\dfrac{6}{9}\)

\(=\left(\dfrac{9}{13}-\dfrac{9}{13}\right)+\left(-\dfrac{11}{9}+\dfrac{6}{9}\right)\)

\(=\dfrac{-11+6}{9}=\dfrac{-5}{9}\)