1. Thực hiện phép tinh một cách hợp lý:
a) A = \(\dfrac{4}{3}-\dfrac{22}{35}+\dfrac{23}{3}-\dfrac{13}{35}-2\)
b) B = \(1\dfrac{5}{3}.\dfrac{2}{7}+\dfrac{8}{3}.\dfrac{5}{7}-\dfrac{2}{3}\)
c) C = \(\dfrac{515}{2019}.\dfrac{-2017}{2018}+\dfrac{515}{2019}.\dfrac{-1}{2018}\)
d) D = \(5\dfrac{2}{3}:\left(\dfrac{-2}{7}\right)-7\dfrac{2}{3}:\dfrac{2}{7}\)
e) E = \(\dfrac{15}{34}+\dfrac{15}{17}+\dfrac{19}{34}-1\dfrac{15}{17}+\dfrac{2}{3}\)
f) F = \(5\dfrac{6}{7}.\left(\dfrac{-5}{6}+\dfrac{6}{7}\right)+\dfrac{41}{7}.\left(-\dfrac{1}{6}+\dfrac{1}{7}\right)\)
g) G = \(\dfrac{1}{3}-\dfrac{1}{7}+\dfrac{3}{2}+\dfrac{17}{3}-\dfrac{27}{7}\)
h) H = \(7\dfrac{1}{3}.2\dfrac{1}{11}-7\dfrac{1}{3}.1\dfrac{9}{11}-\dfrac{3}{2}\)
a: \(=\dfrac{4}{3}+\dfrac{23}{3}-\dfrac{22}{35}-\dfrac{13}{35}-2\)
=9-1-2=6
b: \(=\dfrac{8}{3}\left(\dfrac{2}{7}+\dfrac{5}{7}\right)-\dfrac{2}{3}=\dfrac{8}{3}-\dfrac{2}{3}=2\)
c: \(=\dfrac{515}{2019}\left(-\dfrac{2017}{2018}-\dfrac{1}{2018}\right)=-\dfrac{515}{2019}\)
