Question

Quy đồng mẫu số các phân số:

a) \(\dfrac{2}{3}\) và \(\dfrac{5}{8}\);     b) \(\dfrac{1}{4}\) và \(\dfrac{7}{12}\);     c) \(\dfrac{5}{6}\) và \(\dfrac{3}{8}\)

Answer 1

a) \(\dfrac{2}{3}=\dfrac{2.8}{3.8}=\dfrac{16}{24}\)

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

b) \(\dfrac{1}{4}=\dfrac{1.3}{4.3}=\dfrac{3}{12}\)

\(\dfrac{7}{12}=\dfrac{7.1}{12.1}=\dfrac{7}{12}\)

c) \(\dfrac{5}{6}=\dfrac{5.4}{6.4}=\dfrac{20}{24}\)

\(\dfrac{3}{8}=\dfrac{3.3}{8.3}=\dfrac{9}{24}\)

Answer 2

a) 58=5.38.3=152458=5.38.3=1524

b) 712=7.112.1=712712=7.112.1=712

c) 38=3.38.3=924

Answer 3

a) 58=5.38.3=152458=5.38.3=1524

b) 712=7.112.1=712712=7.112.1=712

c) 38=3.38.3=924

Answer 4

a) 58=5.38.3=152458=5.38.3=1524

b) 712=7.112.1=712712=7.112.1=712

c) 38=3.38.3=924

Answer 5

a)2/3=16/24

5/8=15/24

b)1/4=3/12

7/12 giữ nguyên

c)5/6=20/24

3/8=9/24