Sau khi thực hiện phép tính: \(\dfrac{-3}{4}-\dfrac{-5}{6}+\dfrac{1}{2}-\dfrac{1}{8}\) , ta có kết quả là
\(\dfrac{11}{24}\). \(\dfrac{5}{12}\). \(\dfrac{1}{2}\). \(\dfrac{13}{24}\). Hướng dẫn giải:\(\dfrac{-3}{4}-\dfrac{-5}{6}+\dfrac{1}{2}-\dfrac{1}{8}\)
\(=\dfrac{-3}{4}+\dfrac{5}{6}+\dfrac{1}{2}-\dfrac{1}{8}\)
\(=\dfrac{-18}{24}+\dfrac{20}{24}+\dfrac{12}{24}-\dfrac{3}{24}\)
\(=\dfrac{\left(-18\right)+20+12-3}{24}=\dfrac{11}{24}\)