Điền số thích hợp vào ô trống: (0,5 điểm)

\(\frac{3}{4}\) m² \(\frac{1}{5}\) dm² = ........mm²

\(\frac{4}{5}\,\, \times \,\,\frac{6}{7}\,\, + \,\,\frac{4}{5}\,\, \times \,\,\frac{3}{7}\)

\(\frac{5}{9}\,\, + \,\,\frac{5}{7}\,\, + \,\,\frac{9}{7}\,\, + \,\,\frac{4}{9}\)

247 897 654 + 124 301 247

951 345 012 – 98 671 302

485 102 × 23

975 237 : 56

\(\frac{1}{4}\) .......\(\frac{7}{{24}}\,\, + \,\,\frac{9}{{24}}\)

\(\frac{8}{{21}}\,\, \times \,\,\frac{{14}}{{16}}\) ...1

\(2\,\,:\,\,\frac{5}{9}\) ..... \(\frac{{36}}{{10}}\)

\(\frac{4}{5}\) ....\(\frac{{37}}{{40}}\,\, - \,\,\frac{{21}}{{40}}\)