Question

a)4/5  x  5/2 - 6/7

b) 3/9 + 7/6

Answer 1

\(a,=\dfrac{4.5}{5.2}-\dfrac{6}{7}=\dfrac{4}{2}-\dfrac{6}{7}=2-\dfrac{6}{7}=\dfrac{2.7-6}{7}=\dfrac{14-6}{7}=\dfrac{8}{7}\\ -------\\ b,=\dfrac{3.6+7.9}{54}=\dfrac{18+63}{54}=\dfrac{81}{54}=\dfrac{3}{2}\)

Answer 2

a, \(\dfrac{4}{5}\times\dfrac{5}{2}-\dfrac{6}{7}\)

\(=2-\dfrac{6}{7}\)

\(=\dfrac{8}{7}\)

 

b, \(\dfrac{3}{9}+\dfrac{7}{6}=\dfrac{3}{2}\)

Answer 3

a.\(2-\dfrac{6}{7}=\dfrac{8}{7}\)

b.\(\dfrac{3}{9}+\dfrac{7}{6}=\dfrac{3}{2}\)

Answer 4

bài nữa ạ

Answer 5

a) 4/5 x 5/2 - 6/7

= 2-6/7

= 8/7

b ) 3/9 + 7/6 = 3/2 

Chúc bạn học tốt !