Tính: [5/8 + (-3/4)]+15/6

* Hướng dẫn giải

$\begin{array}{l}\left[\frac{5}{8}+\left(\frac{-3}{4}\right)\right]+\frac{15}{6}=\frac{15}{24}+\frac{-18}{24}+\frac{60}{24}\\ =\frac{15+\left(-18\right)+60}{24}=\frac{57}{24}=\frac{19}{8}\end{array}$