Question

Rút gọn rồi so sánh hai phân số:

 

a) \(\dfrac{6}{14}\) và \(\dfrac{4}{7}\)                             b) \(\dfrac{3}{5}\) và \(\dfrac{6}{15}\)                          c) \(\dfrac{10}{18}\) và \(\dfrac{2}{9}\)

Answer 1

a) \(\dfrac{6}{14}=\dfrac{6:2}{14:2}=\dfrac{3}{7}\)

\(\dfrac{3}{7}< \dfrac{4}{7}\)

b) \(\dfrac{6}{15}=\dfrac{6:3}{15:3}=\dfrac{2}{5}\)

\(\dfrac{3}{5}>\dfrac{2}{5}\)

c) \(\dfrac{10}{18}=\dfrac{10:2}{18:2}=\dfrac{5}{9}\)

\(\dfrac{5}{9}>\dfrac{2}{9}\)