Tính: 5/9 - 3/9

Lời giải

\(\frac{5}{9} - \frac{3}{9} = \frac{{5 - 3}}{9} = \frac{2}{9}\)

\(\frac{{11}}{7} - \frac{8}{7} = \frac{{11 - 8}}{7} = \frac{3}{7}\)

\(\frac{{15}}{{18}} - \frac{{11}}{{18}} = \frac{{15 - 11}}{{18}} = \frac{4}{{18}} = \frac{2}{9}\)