Question

Giúp tớ bài này ạ tớ đang cần rất gấp ạ

Answer 1

\(\left(\dfrac{5}{2}-\dfrac{4}{3}\right).\dfrac{9}{14}=\dfrac{7}{6}.\dfrac{9}{14}=\dfrac{3}{4}.\\ \dfrac{5}{2}\left(\dfrac{2}{3}-\dfrac{1}{4}\right)=\dfrac{5}{2}.\dfrac{5}{12}=\dfrac{25}{24}.\\ \left(\dfrac{5}{2}+\dfrac{11}{8}\right).\left(\dfrac{8}{3}-\dfrac{20}{15}\right)=\left(\dfrac{5}{2}+\dfrac{11}{8}\right).\left(\dfrac{8}{3}-\dfrac{4}{3}\right)=\dfrac{31}{8}.\dfrac{4}{3}=\dfrac{31}{6}.\)