Điền dấu lớn bé bằng

a) \(\frac{5}{4} - \frac{1}{2}\) = \(\frac{1}{4} + \frac{1}{2}\)

Giải thích

\(\frac{5}{4} - \frac{1}{2} = \frac{5}{4} - \frac{2}{4} = \frac{3}{4}\)

\(\frac{1}{4} + \frac{1}{2} = \frac{1}{4} + \frac{2}{4} = \frac{3}{4}\)

Vì \(\frac{3}{4} = \frac{3}{4}\) nên \(\frac{5}{4} - \frac{1}{2}\) = \(\frac{1}{4} + \frac{1}{2}\)

c) \(\frac{9}{7} + \frac{1}{4}\) < \(\frac{5}{8}\)

Giải thích

\(\frac{9}{7} + \frac{1}{4} = \frac{{36}}{{28}} + \frac{7}{{28}} = \frac{{43}}{{28}} = \frac{{86}}{{56}}\)

\(\frac{5}{8} = \frac{{35}}{{56}}\)

Vì \(\frac{{35}}{{56}} < \frac{{86}}{{56}}\) nên \(\frac{9}{7} + \frac{1}{4}\) < \(\frac{5}{8}\)