Question

1.Khoanh vào các phân số bằng nhau

a.1/2, 2/4, 5/8, 4/8, 9/10, 3/6

b.1/4, 2/9, 2/8, 3/12, 5/16, 5/20

c.2/5, 4/15, 8/20, 8/25, 10/25, 12/20

Answer 1

\(a,\dfrac{1}{2}=\dfrac{2}{4}=\dfrac{4}{8}=\dfrac{3}{6}\\ b,\dfrac{1}{4}=\dfrac{2}{8}=\dfrac{3}{12}=\dfrac{5}{20}\\ c,\dfrac{2}{5}=\dfrac{8}{20}=\dfrac{10}{25}\)