`2/3-5/7xx14/25`
`=2/3-5/14`
`=28/42-15/42`
`=13/42`
\(\dfrac{2}{3}-\dfrac{5}{7}.\dfrac{14}{25}\)
\(=\dfrac{2}{3}-\dfrac{2}{5}\)
\(=\dfrac{4}{15}\)
Chúc bạn học tốt!
\(\dfrac{2}{3}\)-\(\dfrac{5}{7}\).\(\dfrac{14}{25}\)
=\(\dfrac{2}{3}\)-\(\dfrac{5}{14}\)
=\(\dfrac{28}{42}\)-\(\dfrac{15}{42}\)
=\(\dfrac{13}{42}\)