Viết số thích hợp vào ô trống.
Giải thích
\(\frac{7}{6}\,\, = \,\,\frac{{7\,\, \times \,\,5}}{{6\,\, \times \,5}}\,\, = \,\,\frac{{35}}{{30}}\) | \(\frac{{49}}{{63}}\,\, = \,\,\frac{{49\,\,:\,\,7}}{{63\,\,:\,\,7}}\,\, = \,\,\frac{7}{9}\) |
\(\frac{9}{5}\,\, = \,\,\frac{{9\,\, \times \,\,9}}{{5\,\, \times \,\,9}}\,\, = \,\,\frac{{81}}{{45}}\) | \(\frac{{72}}{{64}}\,\, = \,\,\frac{{72\,\,:\,\,8}}{{64:8}}\,\, = \,\,\frac{9}{8}\) |
\(\frac{4}{9}\,\, = \,\,\frac{{4\,\, \times \,\,4}}{{9\,\, \times \,\,4}}\,\, = \,\,\frac{{16}}{{36}}\) | \(\frac{{18}}{{81}}\,\, = \,\,\frac{{18\,\,:\,\,9}}{{81\,\,:\,\,9}}\,\, = \,\,\frac{2}{9}\) |