Question

Giúp mình ạ

Answer 1

b: \(=\dfrac{2}{5}+\dfrac{2}{3}+\dfrac{-1}{6}-\dfrac{3}{4}\)

\(=\dfrac{24}{60}+\dfrac{40}{60}+\dfrac{-10}{60}-\dfrac{45}{60}\)

\(=\dfrac{9}{60}=\dfrac{3}{20}\)

b: \(=\dfrac{4}{13}+\dfrac{9}{13}+\dfrac{-11}{5}+\dfrac{6}{5}=1-1=0\)

b: \(=\dfrac{5}{11}-\dfrac{2}{11}+\dfrac{8}{11}-3\)

=1-3=-2