Question

Giúp vs ạ

Answer 1

\(2\dfrac{1}{5}-1\dfrac{3}{5}=\dfrac{11}{5}-\dfrac{8}{5}=\dfrac{3}{5}\)

\(5\dfrac{1}{4}-2\dfrac{3}{8}=\dfrac{10}{4}-\dfrac{19}{8}=\dfrac{20}{8}-\dfrac{19}{8}=\dfrac{1}{8}\)

\(3\dfrac{3}{5}:4\dfrac{3}{10}=\dfrac{18}{5}:\dfrac{43}{10}=\dfrac{180}{215}=\dfrac{36}{43}\)

\(3\dfrac{2}{3}.5\dfrac{2}{7}=\dfrac{11}{3}.\dfrac{37}{7}=\dfrac{407}{21}\)