Question

Trình bày chi tiết giúp em ạ giải 2 câu thôi cũng đc ạ

Answer 1

\(h,=\dfrac{\dfrac{36}{41}\times\dfrac{41}{9}}{\dfrac{14}{21}\times\dfrac{21}{7}}\times\dfrac{2}{5}=\dfrac{\dfrac{36}{9}}{\dfrac{14}{7}}\times\dfrac{2}{5}=\dfrac{4}{2}\times\dfrac{2}{5}\\ =\dfrac{4}{5}\)

\(i,=\dfrac{\dfrac{34}{21}:\dfrac{6}{31}}{\left(\dfrac{12}{15}\times\dfrac{1}{2}\right):\dfrac{1}{5}}=\dfrac{\dfrac{34}{21}\times\dfrac{31}{6}}{\left(\dfrac{3\times2\times2\times1}{3\times5\times2}\right)\times5}\\ =\dfrac{\dfrac{2\times17\times31}{21\times2\times3}}{\dfrac{2}{5}\times5}=\dfrac{\dfrac{527}{63}}{2}=\dfrac{527}{63}:2=\dfrac{527}{126}\)