\(\dfrac{3}{9}=\dfrac{3:3}{9:3}=\dfrac{1}{3}\)
\(\dfrac{15}{27}=\dfrac{15:3}{27:3}=\dfrac{5}{9}\)
\(\dfrac{28}{20}=\dfrac{28:4}{20:4}=\dfrac{7}{5}\)
\(\dfrac{5}{105}=\dfrac{5:5}{105:5}=\dfrac{1}{21}\)
\(\dfrac{24}{39}=\dfrac{24:3}{39:3}=\dfrac{8}{13}\)
3/9=.....1/3
15/27=.....5/9
28/20=....7/5
5/105=.....1/21
24/39=.....8/13
\(\dfrac{3}{9}=\dfrac{1}{3}\)
\(\dfrac{15}{27}=\dfrac{5}{9}\)
\(\dfrac{28}{20}=\dfrac{7}{5}\)
\(\dfrac{5}{105}=\dfrac{1}{21}\)
\(\dfrac{24}{39}=\dfrac{8}{13}\)
tham khảo nha.
