Tính nhanh:
a) \(\frac{-3}{7}\)+\(\frac{15}{26}\)- (\(\frac{2}{13}\)-\(\frac{3}{7}\))
b) 2.\(\frac{3}{7}\)+ (\(\frac{2}{9}\)- 1\(\frac{3}{7}\)) - \(\frac{5}{3}\):\(\frac{1}{9}\)
c) \(\frac{-11}{23}\).\(\frac{6}{7}\)+\(\frac{8}{7}\).\(\frac{-11}{23}\)-\(\frac{1}{23}\)
d) (\(\frac{377}{-231}\)-\(\frac{123}{89}\)+\(\frac{34}{791}\)) . (\(\frac{1}{6}\)-\(\frac{1}{8}\)-\(\frac{1}{24}\))
a)\(=\frac{-3}{7}+\frac{15}{26}-\frac{2}{13}+\frac{3}{7}\)
\(=\left(\frac{-3}{7}+\frac{3}{7}\right)-\left(\frac{15}{26}+\frac{2}{13}\right)\)
\(=0-\frac{19}{26}\)
\(=-\frac{19}{26}\)
c)\(=\frac{-11}{23}.\left(\frac{6}{7}+\frac{8}{7}\right)-\frac{1}{23}\)
\(=\frac{-11}{23}.2-\frac{1}{23}\)
\(=\frac{-22}{23}-\frac{1}{23}\)
\(=-1\)