Question

Tính:

\(A=\)\(\dfrac{1}{5}+\left(\dfrac{-1}{3}+\dfrac{9}{5}\right)+\dfrac{-7}{6}\)

Answer 1

A= \(\dfrac{1}{5}+\dfrac{22}{15}+\dfrac{-7}{6}\)

A= \(\dfrac{1}{2}\)

Answer 2

\(A=\dfrac{1}{5}+\left(-\dfrac{1}{3}+\dfrac{9}{5}\right)+\dfrac{-7}{6}\\ A=\left(\dfrac{1}{5}+\dfrac{9}{5}\right)+\left(-\dfrac{1}{3}-\dfrac{7}{6}\right)\\ A=2-\dfrac{3}{2}=\dfrac{1}{2}\)

Answer 3

A =\(\dfrac{1}{5}\) + ( \(\dfrac{-1}{3}\)+\(\dfrac{9}{5}\) ) +\(\dfrac{-7}{6}\) 

A =\(\dfrac{1}{5}\) + \(\dfrac{22}{15}\) +\(\dfrac{-7}{6}\) 

A =\(\dfrac{1}{2}\)