thực hiện phép tính
d) \(\dfrac{-5}{9}+\dfrac{3}{5}-\dfrac{3}{9}+\dfrac{-2}{5}\) c) \(\left(\dfrac{1}{9}-\dfrac{9}{17}\right)+\dfrac{3}{6}-\left(\dfrac{12}{17}-\dfrac{1}{2}\right)+\dfrac{5}{9}\)
help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
d, \(\dfrac{-5}{9}+\dfrac{3}{5}-\dfrac{3}{9}+\dfrac{-2}{5}\)
\(=\left(\dfrac{-5}{9}+\dfrac{-3}{9}\right)+\left(\dfrac{3}{5}+\dfrac{-2}{5}\right)\)
\(=\dfrac{-8}{9}+\dfrac{1}{5}=-\dfrac{31}{45}\)
e) \(\left(\dfrac{1}{9}-\dfrac{9}{17}\right)+\dfrac{3}{6}-\left(\dfrac{12}{17}-\dfrac{1}{2}\right)+\dfrac{5}{9}\)
\(=\dfrac{1}{9}-\dfrac{9}{17}+\dfrac{3}{6}-\dfrac{12}{17}+\dfrac{1}{2}+\dfrac{5}{9}\)
\(=\left(\dfrac{1}{9}+\dfrac{5}{9}\right)+\left(\dfrac{-9}{17}+\dfrac{-12}{17}\right)+\left(\dfrac{1}{2}+\dfrac{1}{2}\right)\)
\(=\dfrac{2}{3}+\left(-1\right)+1\)
\(=\dfrac{2}{3}+0=\dfrac{2}{3}\)
