Question

Tính

a,3 :\(\dfrac{5}{7}\)

 

b,\(\dfrac{2}{3}\)+\(\dfrac{1}{2}\)

Answer 1

a, \(\dfrac{3}{1}:\dfrac{5}{7}=\dfrac{3}{1}\times\dfrac{7}{5}=\dfrac{21}{5}\)

b, \(\dfrac{2}{3}+\dfrac{1}{2}=\dfrac{4}{6}+\dfrac{3}{6}=\dfrac{7}{6}\)

Answer 2

a , = 21/5

b, =7/6

Answer 3

a, 3 : 2/3 + = 7/6

Answer 4

a \(3\times\dfrac{7}{5}=\dfrac{21}{5}\)

b \(\dfrac{2}{3}+\dfrac{1}{2}=\dfrac{4}{6}+\dfrac{3}{6}=\dfrac{7}{6}\)

Answer 5

a) = 21/5

b) = 7/6

chắc vậy á

Answer 6

a,= 21/5

b,=7/6

Answer 7

a= 21/5

b=7/6