Question

cứu em đi các chế iuuu

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

\(2,5-\left(\dfrac{-5}{6}\right)^0+\left(\dfrac{-1}{6}\right)^2\cdot\left(-3\right)\)

Answer 1

a: \(\dfrac{2}{5}+\dfrac{3}{5}:\left(-\dfrac{3}{2}\right)+\dfrac{1}{2}\)

\(=\dfrac{2}{5}+\dfrac{3}{5}\cdot\dfrac{-2}{3}+\dfrac{1}{2}\)

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

b: \(2,5-\left(-\dfrac{5}{6}\right)^0+\left(-\dfrac{1}{6}\right)^2\cdot\left(-3\right)\)

\(=\dfrac{5}{2}-1+\dfrac{1}{36}\cdot\left(-3\right)\)

\(=\dfrac{3}{2}-\dfrac{1}{12}=\dfrac{18}{12}-\dfrac{1}{12}=\dfrac{17}{12}\)