Câu trả lời:

\(\dfrac{5}{4}-3\left(\dfrac{-1}{3}\right)2-\dfrac{1}{2}=\dfrac{5}{4}-\left(-2\right)-\dfrac{1}{2}=\dfrac{13}{4}-\dfrac{1}{2}=\dfrac{13}{4}-\dfrac{2}{4}=\dfrac{11}{4}\)