a, \(\frac{3}{5}-\left(-\frac{7}{10}\right)-\frac{13}{20}=\frac{3}{5}+\frac{7}{10}-\frac{13}{20}=\frac{12}{20}+\frac{14}{20}-\frac{13}{20}=\frac{13}{20}\)
b, \(\frac{3}{4}+\frac{-1}{3}-\frac{5}{18}=\frac{27}{36}+\frac{-12}{36}-\frac{10}{36}=\frac{5}{36}\)
c, \(\frac{3}{14}-\frac{5}{-8}+\frac{-1}{2}=\frac{12}{56}+\frac{35}{56}+\frac{-28}{56}=\frac{19}{56}\)
d, \(\frac{1}{2}+\frac{1}{-3}+\frac{1}{4}-\left(-\frac{1}{6}\right)=\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{1}{6}=\frac{6}{12}+\frac{-4}{12}+\frac{3}{12}+\frac{2}{12}=\frac{7}{12}\)
đ, \(\frac{19}{24}-\frac{1}{2}-\frac{1}{3}-\frac{7}{24}=\frac{19}{24}-\frac{12}{24}-\frac{8}{24}-\frac{7}{24}=-\frac{8}{24}=-\frac{1}{3}\)
g, \(-\frac{1}{3}+\frac{1}{2}-\frac{5}{6}=-\frac{2}{6}+\frac{3}{6}-\frac{5}{6}=-\frac{4}{6}=\frac{-2}{3}\)
e, \(\frac{4}{-9}+\frac{8}{5}+\frac{-5}{9}-\frac{2}{11}+\frac{7}{15}=\frac{-220}{495}+\frac{792}{495}+\frac{-275}{495}-\frac{90}{495}+\frac{231}{495}=\frac{438}{495}=\frac{146}{165}\)
ê, \(\frac{7}{11}-\left(\frac{3}{5}+\frac{7}{11}\right)=\frac{7}{11}-\frac{3}{5}-\frac{7}{11}=\left(\frac{7}{11}-\frac{7}{11}\right)-\frac{3}{5}=0-\frac{3}{5}=-\frac{3}{5}\)
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