` 3 4/5 xx 1/2`
`= 19/5 xx 1/2`
`=19/10`
\(3\dfrac{4}{5}\times\dfrac{1}{2}=\dfrac{19}{5}\times\dfrac{1}{2}=\dfrac{19}{10}\)
\(3\dfrac{4}{5}.\dfrac{1}{2}=\dfrac{19}{4}.\dfrac{1}{2}=\dfrac{19}{8}\)
Dấu "." là dấu nhân nhé
\(3\dfrac{4}{5}.\dfrac{1}{2}=\dfrac{19}{5}.\dfrac{1}{2}=\dfrac{19}{10}\)