同学们,这里有40道题目,每做对1道题可夺得一面旗帜,比一比5分钟的时间里,谁夺得的旗帜最多。
$\frac{1}{5} + \frac{3}{5} =$
$\frac{9}{10} - \frac{4}{5} =$
$18 - \frac{5}{6} =$
$\frac{4}{9} × \frac{3}{8} =$
$\frac{3}{10} ÷ \frac{3}{5} =$
$\frac{4}{5} ÷ 8 =$
$8 ÷ \frac{2}{3} =$
$\frac{1}{3} + \frac{3}{5} =$
$5 × \frac{2}{3} =$
$\frac{10}{11} ÷ \frac{1}{5} =$
$7 - \frac{1}{2} =$
$\frac{3}{4} - \frac{1}{2} =$
$\frac{1}{8} + \frac{1}{3} =$
$\frac{3}{5} × \frac{10}{9} =$
$\frac{8}{27} ÷ \frac{2}{9} =$
$\frac{3}{16} × 4 =$
$\frac{2}{3} - \frac{1}{6} =$
$\frac{21}{5} ÷ \frac{3}{5} =$
$\frac{6}{7} - \frac{3}{14} =$
$\frac{3}{16} × \frac{8}{5} =$
$\frac{9}{16} ÷ \frac{1}{4} =$
$\frac{5}{9} ÷ 15 =$
$\frac{3}{10} × \frac{10}{21} =$
$\frac{9}{10} - \frac{73}{100} =$
$\frac{7}{8} × \frac{8}{21} =$
$10 ÷ \frac{5}{7} =$
$\frac{1}{6} + \frac{2}{3} =$
$\frac{7}{6} ÷ \frac{7}{36} =$
$\frac{15}{2} × \frac{2}{5} =$
$\frac{7}{30} ÷ \frac{7}{6} =$
$1 - \frac{4}{5} =$
$22 ÷ \frac{11}{12} =$
$\frac{11}{15} - \frac{8}{15} =$
$\frac{1}{6} + \frac{7}{24} =$
$\frac{7}{5} ÷ \frac{11}{25} =$
$15 × \frac{4}{5} =$
$\frac{18}{5} ÷ \frac{3}{5} - \frac{1}{3} =$
$\frac{7}{8} × \frac{2}{5} ÷ \frac{1}{4} =$
$\frac{17}{10} - \frac{3}{20} - \frac{17}{20} =$
$\frac{3}{4} × \frac{1}{2} × \frac{1}{3} =$
结果统计:我夺了()面旗帜。

$\frac{1}{5} + \frac{3}{5} = \frac{4}{5}$
$\frac{9}{10} - \frac{4}{5} = \frac{1}{10}$
$18 - \frac{5}{6} = 17\frac{1}{6}$
$\frac{4}{9} × \frac{3}{8} = \frac{1}{6}$
$\frac{3}{10} ÷ \frac{3}{5} = \frac{1}{2}$
$\frac{4}{5} ÷ 8 = \frac{1}{10}$
$8 ÷ \frac{2}{3} = 12$
$\frac{1}{3} + \frac{3}{5} = \frac{14}{15}$
$5 × \frac{2}{3} = \frac{10}{3}$
$\frac{10}{11} ÷ \frac{1}{5} = \frac{50}{11}$
$7 - \frac{1}{2} = 6\frac{1}{2}$
$\frac{3}{4} - \frac{1}{2} = \frac{1}{4}$
$\frac{1}{8} + \frac{1}{3} = \frac{11}{24}$
$\frac{3}{5} × \frac{10}{9} = \frac{2}{3}$
$\frac{8}{27} ÷ \frac{2}{9} = \frac{4}{3}$
$\frac{3}{16} × 4 = \frac{3}{4}$
$\frac{2}{3} - \frac{1}{6} = \frac{1}{2}$
$\frac{21}{5} ÷ \frac{3}{5} = 7$
$\frac{6}{7} - \frac{3}{14} = \frac{9}{14}$
$\frac{3}{16} × \frac{8}{5} = \frac{3}{10}$
$\frac{9}{16} ÷ \frac{1}{4} = \frac{9}{4}$
$\frac{5}{9} ÷ 15 = \frac{1}{27}$
$\frac{3}{10} × \frac{10}{21} = \frac{1}{7}$
$\frac{9}{10} - \frac{73}{100} = \frac{17}{100}$
$\frac{7}{8} × \frac{8}{21} = \frac{1}{3}$
$10 ÷ \frac{5}{7} = 14$
$\frac{1}{6} + \frac{2}{3} = \frac{5}{6}$
$\frac{7}{6} ÷ \frac{7}{36} = 6$
$\frac{15}{2} × \frac{2}{5} = 3$
$\frac{7}{30} ÷ \frac{7}{6} = \frac{1}{5}$
$1 - \frac{4}{5} = \frac{1}{5}$
$22 ÷ \frac{11}{12} = 24$
$\frac{11}{15} - \frac{8}{15} = \frac{1}{5}$
$\frac{1}{6} + \frac{7}{24} = \frac{11}{24}$
$\frac{7}{5} ÷ \frac{11}{25} = \frac{35}{11}$
$15 × \frac{4}{5} = 12$
$\frac{18}{5} ÷ \frac{3}{5} - \frac{1}{3} = 5\frac{2}{3}$
$\frac{7}{8} × \frac{2}{5} ÷ \frac{1}{4} = \frac{7}{5}$
$\frac{17}{10} - \frac{3}{20} - \frac{17}{20} = \frac{7}{10}$
$\frac{3}{4} × \frac{1}{2} × \frac{1}{3} = \frac{1}{8}$
结果统计:我夺了(40)面旗帜。