Bài 2 : Tính
a) \(\dfrac{3}{4}\) - \(\dfrac{-5}{2}\) - \(\dfrac{7}{-24}\)
b) \(\dfrac{4}{7}\) + \(\dfrac{-5}{8}\) - \(\dfrac{3}{28}\)
c) \(\dfrac{7}{36}\) - \(\dfrac{8}{-9}\) + \(\dfrac{-2}{3}\)
d) \(\dfrac{-1}{2}\) + \(\dfrac{3}{7}\) - \(\dfrac{1}{9}\) + \(\dfrac{-7}{18}\) + \(\dfrac{4}{7}\)
e) \(\dfrac{2}{7}\) + \(\dfrac{-3}{8}\) + \(\dfrac{11}{7}\) + \(\dfrac{1}{3}\) + \(\dfrac{1}{7}\) + \(\dfrac{5}{-8}\)