Question

Quy đồng

 

\(\dfrac{2}{3}\) ;\(\dfrac{1}{2}\) và \(\dfrac{5}{18}\)

 

\(\dfrac{1}{4}\) ; \(\dfrac{1}{3}\) và \(\dfrac{5}{12}\)

Answer 1

a: 2/3=12/18

1/2=9/18

5/18=5/18

b: 1/4=3/12

1/3=4/12

5/12=5/12

Answer 2

a, Mẫu số chung : \(18\)

\(\dfrac{2}{3}=\dfrac{2.6}{3.6}=\dfrac{12}{18}\)

Giữ nguyên \(\dfrac{5}{18}\)

\(\dfrac{1}{2}=\dfrac{9}{18}\)

b, Mẫu số chung : \(12\)

\(\dfrac{1}{4}=\dfrac{3}{12}\\ \dfrac{1}{3}=\dfrac{4}{12}\)

Giữ nguyên \(\dfrac{5}{12}\)