Question

Quy đồng mẫu số các phân số sau:

Answer 1

a)cái đầu không cần

\(\dfrac{9}{7}=\dfrac{9.2}{7.2}=\dfrac{18}{14}\)

Answer 2

a) \(\dfrac{9}{7}=\dfrac{9\times2}{7\times2}=\dfrac{18}{14}\)     ;    \(\dfrac{3}{14}\)

b) \(\dfrac{5}{12}=\dfrac{5\times4}{12\times4}=\dfrac{20}{48}\)     ;    \(\dfrac{7}{48}\)

c) \(\dfrac{8}{13}=\dfrac{8\times2}{13\times2}=\dfrac{16}{26}\)     ;     \(\dfrac{11}{26}\)

Answer 3

hoi lau bn oi

Answer 4

\(\dfrac{3}{14}\)=\(\dfrac{3}{14}\)

\(\dfrac{9}{7}\)=\(\dfrac{9.2}{7.2}\)=\(\dfrac{18}{14}\)