mk làm đầu nhé
(\(\frac{2}{3}\)-\(\frac{4}{7}\))*\(\frac{2}{5}\)
=\(\frac{2}{21}\)*\(\frac{2}{5}\)
=\(\frac{4}{105}\)
Cách 2
=\(\frac{2}{3}\)*\(\frac{2}{5}\)-\(\frac{4}{7}\)*\(\frac{2}{5}\)
=\(\frac{4}{15}\)-\(\frac{8}{35}\)
=\(\frac{4}{105}\)
k mk nhé thanks bạn nhì nhìu
C1 : (2/3 - 4/7) x 2/5
= 2/21 x 2/5
= 4/105
C2 : (2/3 - 4/7) x 2/5 = 4/105
cách 1: cách 2:
(2/3-4/7)x2/5 (2/3-4/7)x2/5
=2/21x2/5 =2/5x2/3-4/7x2/5
=4/105 =4/15-8/35
=4/105
