Question

 Quy đồng mẫu số các phân số sau:

a) 1/3;3/4;5/8    b)2/3;3/4;7/12    c) 1/5;1/6;1/30

 

Answer 1

a)  \(\dfrac{1}{3}=\dfrac{1.8}{3.8}=\dfrac{8}{24}\)

     \(\dfrac{3}{4}=\dfrac{3.6}{4.6}=\dfrac{18}{24}\)

     \(\dfrac{5}{8}=\dfrac{5.3}{8.3}=\dfrac{15}{24}\)

b)  \(\dfrac{2}{3}=\dfrac{2.4}{3.4}=\dfrac{8}{12}\)

     \(\dfrac{3}{4}=\dfrac{3.3}{4.3}=\dfrac{9}{12}\)

     \(\dfrac{7}{12}=\dfrac{7}{12}\)

c) \(\dfrac{1}{5}=\dfrac{1.6}{5.6}=\dfrac{6}{30}\)

    \(\dfrac{1}{6}=\dfrac{1.5}{6.5}=\dfrac{5}{30}\)

    \(\dfrac{1}{30}=\dfrac{1}{30}\)