Question

So sah 2 phân số: 4/9 5/4
                              2/7, 7/2

Answer 1

\(\dfrac{4}{9}< 1;\dfrac{5}{4}>1\\ \Rightarrow\dfrac{4}{9}< \dfrac{5}{4}\\ \dfrac{2}{7}< 1;\dfrac{7}{2}>1\\ \Rightarrow\dfrac{2}{7}< \dfrac{7}{2}\)

Answer 2

\(\dfrac{4}{9}va\dfrac{5}{4}\)

Vì 4x4=16<5x9=45

=>\(\dfrac{4}{9}< \dfrac{5}{4}\)

\(\dfrac{2}{7}va\dfrac{7}{2}\)

Vì 2x2=4<7x7=49

=>\(\dfrac{2}{7}< \dfrac{7}{2}\)