Question

[Phú Nguyễn Duy]

Bài 1: Quy đồng các phân số sau:

 a)7/8 và13/3                                                          b)9/12 và11/20

Answer 1

[Kiều Vũ Linh]

a) \(\dfrac{7}{8}=\dfrac{7\times3}{8\times3}=\dfrac{21}{24}\)

\(\dfrac{13}{3}=\dfrac{13\times8}{3\times8}=\dfrac{104}{24}\)

b) \(\dfrac{9}{12}=\dfrac{9:3}{12:3}=\dfrac{3}{4}=\dfrac{3\times5}{4\times5}=\dfrac{15}{20}\)

\(\dfrac{11}{20}\)

Answer 2

[Nguyễn Trịnh Tùng]

a)7/8 = 7 x 3/8 x 3 = 21/24

13/3 = 13 x 8/3 x 8 = 104/24

b)9/12 = 9 : 3/12 : 3 = 3/4 = 3 x 5/4 x 5 = 15/20