C1 : \(\left(\frac{6}{7}-\frac{4}{7}\right)\) / \(\frac{2}{5}\)= \(\frac{2}{7}\) / \(\frac{2}{5}\) = \(\frac{10}{14}\) = \(\frac{5}{7}\)
C2 : \(\left(\frac{6}{7}-\frac{4}{7}\right)\) / \(\frac{2}{5}\) = \(\frac{6}{7}\) / \(\frac{2}{5}\) - \(\frac{4}{7}\) / \(\frac{2}{5}\) = \(\frac{30}{14}\) - \(\frac{20}{14}\) = \(\frac{10}{14}\) = \(\frac{5}{7}\) nha bạn
Ai k mk mk k lại
Cách 1
( 6/7 - 4/7 ) : 2/5
= 2/7 : 2/5
= 5/7
Cách 2 :
6/7 : 2/5 - 4/7 : 2/5
= 15/7 - 10/7
= 5/7
Cách 1: (6/7-4/7):2/5
=2/7 : 2/5 = 5/7
Cách 2:(6/7 -4/7):2/5
=6/7 :2/5 -4/7 :2/5
=15/7 - 10/7 = 5/7
Nhớ