Question

Tính

\(\left(-0,75.\dfrac{-1}{4}\right):\left(-5\right)+\dfrac{1}{5}+\dfrac{1}{5}-\left(\dfrac{-1}{5}\right):\left(-3\right)\)

Answer 1

\(\left(-0,75.\dfrac{-1}{4}\right):\left(-5\right)+\dfrac{1}{5}+\dfrac{1}{5}-\left(\dfrac{-1}{5}\right):\left(-3\right)\)

\(=\left(\dfrac{-3}{4}.\dfrac{-1}{4}\right):\left(-5\right)+\dfrac{1}{5}+\dfrac{1}{5}+\dfrac{1}{5}:\left(-3\right)\)

\(=\left(\dfrac{3}{16}\right):\left(-5\right)+\dfrac{1}{5}+\dfrac{1}{5}+\dfrac{1}{5}.\dfrac{-1}{3}\)

\(=\dfrac{-3}{80}+\dfrac{1}{5}+\dfrac{1}{5}+\dfrac{-1}{15}\)

\(=\dfrac{71}{240}\)