Ta có : \(\frac{1}{3}\)\(=\)\(\frac{1x4}{3x4}\)\(=\)\(\frac{4}{12}\)\(=\)\(\frac{24}{72}\)
\(\frac{1}{3}\)\(=\)\(\frac{1x3}{4x3}\)\(=\)\(\frac{3}{12}\)\(=\)\(\frac{18}{72}\)
\(\Rightarrow\)5 phân số đó là : \(\frac{19}{72}\);\(\frac{20}{72}\);\(\frac{21}{72}\);\(\frac{22}{72}\);\(\frac{23}{72}\)