đổi cái ảnh đại diện đi

\(\dfrac{-3}{8}\) + \(\dfrac{12}{25}\) + \(\dfrac{5}{-8}\) + \(\dfrac{2}{-5}+\dfrac{13}{25}\)

= \(\left(\dfrac{-3}{8}+\dfrac{5}{-8}\right)+\left(\dfrac{12}{25}+\dfrac{13}{25}\right)+\dfrac{2}{-5}\)

= \(\left(\dfrac{-3}{8}+\dfrac{-5}{8}\right)+1+\dfrac{-2}{5}\)

= 1 + 1 + \(\dfrac{-2}{5}\)

= \(\dfrac{8}{5}\)