2. thực hiện phép tính
a. \(\dfrac{3}{4}\)+\(\dfrac{3}{5}\)-\(\dfrac{18}{60}\)
b. \(\dfrac{17}{8}\)-\(\dfrac{11}{6}\)-\(\dfrac{2}{9}\)
c. \(\dfrac{20}{45}\)+\(\dfrac{14}{35}\)+\(\dfrac{32}{44}\)
d.\(\dfrac{23}{29}\)+\(\dfrac{5}{11}\)+\(\dfrac{17}{11}\)
e.\(17\dfrac{25}{27}\)+\(3\dfrac{7}{2}\)