\(\dfrac{5}{7}\times\dfrac{3}{5}-\dfrac{10}{14}\times\dfrac{2}{5}\)
\(=\dfrac{3}{7}-\dfrac{2}{7}\)
\(=\dfrac{1}{7}\)
Chúc bạn học tốt
\(\dfrac{5}{7}\) \(\times\) \(\dfrac{3}{5}\) - \(\dfrac{10}{14}\) \(\times\) \(\dfrac{2}{5}\)
= \(\dfrac{3}{7}\) - \(\dfrac{2}{7}\)
= \(\dfrac{1}{7}\)
5/7 x 3/5 - 10/14 x 2/5
=15/35 - 10/35
=5/35 =1/7