Question

chuyển hỗn số thành phân số rùi tính :

\(2\dfrac{2}{3}:3\dfrac{2}{1}=??\)

Answer 1

\(2\dfrac{2}{3}=\dfrac{2\times3+2}{3}=\dfrac{8}{3}\)

\(3\dfrac{2}{1}=\dfrac{3\times1+2}{1}=\dfrac{5}{1}\)

\(\dfrac{8}{3}:\dfrac{5}{1}=\dfrac{8}{3}\times\dfrac{1}{5}=\dfrac{8}{15}\)

Answer 2

Chuyển hỗn số thành phân số :

\(2\dfrac{2}{3}=\dfrac{2x3+2}{3}=\dfrac{8}{3}\)

\(3\dfrac{2}{1}=\dfrac{3x1+2}{3}=\dfrac{5}{3}\)

Vậy nên :

\(2\dfrac{2}{3}:3\dfrac{2}{1}=\dfrac{8}{3}:\dfrac{5}{3}=\dfrac{8}{3}x\dfrac{3}{5}=\dfrac{24}{15}=\dfrac{8}{5}\)

 

Answer 3

\(3\dfrac{2}{1}=\dfrac{3x1+2}{1}=\dfrac{5}{1}\)

\(\dfrac{8}{3}x\dfrac{1}{5}=\dfrac{8}{15}\)