Viết số thích hợp vào ô trống: \(\frac{8}{7}\,\, = \,\,\frac{{8\,\, \times \,\,\,1}}{{7\,\, \times \,\,\,1}}\,\, = \,\,\frac{{24}}{{\,1}}\) \(\frac{{64}}{{72}}\,\, = \,\,\frac{{64\,\,:\,
Giải thích
\(\frac{8}{7}\,\, = \,\,\frac{{8\,\, \times \,\,3}}{{7\,\, \times \,\,3}}\,\, = \,\,\frac{{24}}{{21}}\) | \[\frac{{64}}{{72}}\,\, = \,\,\frac{{64\,\,:\,\,8}}{{72\,\,:\,\,8}}\,\, = \,\,\frac{8}{9}\] |
\(\frac{5}{9}\,\, = \,\,\frac{{5\,\, \times \,\,5}}{{9\,\, \times \,\,5}}\,\, = \,\,\frac{{25}}{{45}}\) | \(\frac{{36}}{{24}}\,\, = \,\,\frac{{36\,\,:\,\,12}}{{24\,\,:\,\,12}}\,\, = \,\,\frac{3}{2}\) |