Tính biểu thức: 5/8 + 13/24 =

\(\frac{5}{8}\) + \(\frac{{13}}{{24}}\) = \(\frac{{15}}{{24}}\) + \(\frac{{13}}{{24}}\) = \[\frac{{28}}{{24}}\] = \(\frac{7}{6}\)

\(\frac{8}{9}\) – \(\frac{{14}}{{18}}\) = \(\frac{8}{9}\) – \(\frac{7}{9}\) = \(\frac{1}{9}\)

\(\frac{5}{3}\) × \(\frac{3}{7}\) = \(\frac{5}{7}\)

\(\frac{5}{{12}}\) : \(\frac{5}{4}\) = \(\frac{5}{{12}}\) × \(\frac{4}{5}\) = \(\frac{1}{3}\)