Question

Trình bày chi tiết nhé

Answer 1

\(A=\dfrac{-19}{9}\left(\dfrac{1}{2}-\dfrac{4}{11}\right)+\dfrac{-2}{3}=\dfrac{-19}{9}\cdot\dfrac{3}{22}+\dfrac{-2}{3}=\dfrac{-21}{22}\)

\(B=\dfrac{15}{6}\cdot2-\dfrac{7}{12}+\dfrac{1}{3}\cdot\dfrac{11}{2}=\dfrac{15}{3}-\dfrac{7}{12}+\dfrac{11}{6}\)

\(=\dfrac{60}{12}-\dfrac{7}{12}+\dfrac{22}{12}=\dfrac{75}{12}=\dfrac{25}{4}\)

\(C=\dfrac{-3}{4}\cdot8+\dfrac{1}{3}\cdot\dfrac{7}{2}-\dfrac{5}{18}=-6+\dfrac{7}{6}-\dfrac{5}{18}=\dfrac{-108}{18}+\dfrac{21}{18}-\dfrac{5}{18}=\dfrac{-92}{18}=\dfrac{-46}{9}\)