ta có : `3/5=(3xx11)/(5xx11)=33/55`
`33=33->3/5=33/55`
`3/5=3/5`
`33/55=(33:11)/(55:11)=3/5`
Vì `3=3` nên `3/5=3/5`
Vậy `3/5=33/55`
\(\dfrac{33}{55}=\dfrac{33:11}{55:11}=\dfrac{3}{5}=>\dfrac{3}{5}=\dfrac{33}{55}\)
\(\dfrac{3}{5}=\dfrac{3}{5}\)
\(\dfrac{33}{55}=\dfrac{33:11}{55:11}=\dfrac{3}{5}\)
\(\Rightarrow\dfrac{3}{5}=\dfrac{33}{55}\)
\(\dfrac{33}{55}=\dfrac{3\times11}{5\times11}=\dfrac{3}{5}\)
\(\Rightarrow\dfrac{3}{5}=\dfrac{33}{55}\)