口算(4)
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。
$\frac{5}{9} × \frac{4}{5} =$ $\frac{3}{4} ÷ \frac{1}{4} =$ $0 ÷ \frac{3}{4} =$ $\frac{1}{14} × \frac{14}{15} =$
$\frac{1}{3} + \frac{5}{6} =$ $\frac{9}{20} - \frac{3}{10} =$ $1 - \frac{1}{66} =$ $\frac{34}{33} × \frac{33}{34} =$
$\frac{3}{5} + \frac{1}{2} =$ $\frac{3}{4} × \frac{8}{9} =$ $\frac{1}{7} ÷ \frac{2}{7} =$ $\frac{3}{11} × 22 =$
$\frac{2}{3} - 0 =$ $\frac{10}{13} × \frac{13}{20} =$ $7 ÷ \frac{7}{2} =$ $\frac{1}{7} - \frac{1}{8} =$
$\frac{2}{30} - \frac{1}{30} =$ $\frac{2}{5} ÷ \frac{3}{5} =$ $\frac{2}{7} - \frac{3}{14} =$ $\frac{9}{16} × \frac{8}{9} =$
$\frac{1}{4} ÷ \frac{3}{4} =$ $\frac{5}{6} ÷ 25 =$ $\frac{7}{20} × \frac{10}{21} =$ $\frac{84}{100} - \frac{73}{100} =$
$\frac{3}{21} ÷ \frac{1}{21} =$ $\frac{4}{5} ÷ 2 =$ $8 ÷ \frac{4}{5} =$ $\frac{1}{30} + \frac{1}{5} =$
$\frac{10}{17} × \frac{17}{20} =$ $\frac{9}{10} ÷ \frac{9}{40} =$ $1 - \frac{13}{15} =$ $33 ÷ \frac{11}{12} =$
$\frac{2}{3} - \frac{1}{9} =$ $\frac{5}{6} + 7 =$ $\frac{7}{5} ÷ \frac{7}{25} =$ $35 × \frac{4}{5} =$
$\frac{18}{5} ÷ \frac{9}{5} - \frac{1}{3} =$ $\frac{15}{22} × \frac{11}{30} ÷ \frac{1}{2} =$ $2 - \frac{1}{16} - \frac{15}{16} =$ $( \frac{3}{4} + \frac{1}{2} ) × 4 =$
结果统计:我夺了()面旗帜。

$\frac{5}{9} × \frac{4}{5} = \frac{4}{9}$
$\frac{3}{4} ÷ \frac{1}{4} = 3$
$0 ÷ \frac{3}{4} = 0$
$\frac{1}{14} × \frac{14}{15} = \frac{1}{15}$
$\frac{1}{3} + \frac{5}{6} = \frac{7}{6}$
$\frac{9}{20} - \frac{3}{10} = \frac{3}{20}$
$1 - \frac{1}{66} = \frac{65}{66}$
$\frac{34}{33} × \frac{33}{34} = 1$
$\frac{3}{5} + \frac{1}{2} = \frac{11}{10}$
$\frac{3}{4} × \frac{8}{9} = \frac{2}{3}$
$\frac{1}{7} ÷ \frac{2}{7} = \frac{1}{2}$
$\frac{3}{11} × 22 = 6$
$\frac{2}{3} - 0 = \frac{2}{3}$
$\frac{10}{13} × \frac{13}{20} = \frac{1}{2}$
$7 ÷ \frac{7}{2} = 2$
$\frac{1}{7} - \frac{1}{8} = \frac{1}{56}$
$\frac{2}{30} - \frac{1}{30} = \frac{1}{30}$
$\frac{2}{5} ÷ \frac{3}{5} = \frac{2}{3}$
$\frac{2}{7} - \frac{3}{14} = \frac{1}{14}$
$\frac{9}{16} × \frac{8}{9} = \frac{1}{2}$
$\frac{1}{4} ÷ \frac{3}{4} = \frac{1}{3}$
$\frac{5}{6} ÷ 25 = \frac{1}{30}$
$\frac{7}{20} × \frac{10}{21} = \frac{1}{6}$
$\frac{84}{100} - \frac{73}{100} = \frac{11}{100}$
$\frac{3}{21} ÷ \frac{1}{21} = 3$
$\frac{4}{5} ÷ 2 = \frac{2}{5}$
$8 ÷ \frac{4}{5} = 10$
$\frac{1}{30} + \frac{1}{5} = \frac{7}{30}$
$\frac{10}{17} × \frac{17}{20} = \frac{1}{2}$
$\frac{9}{10} ÷ \frac{9}{40} = 4$
$1 - \frac{13}{15} = \frac{2}{15}$
$33 ÷ \frac{11}{12} = 36$
$\frac{2}{3} - \frac{1}{9} = \frac{5}{9}$
$\frac{5}{6} + 7 = 7\frac{5}{6}$
$\frac{7}{5} ÷ \frac{7}{25} = 5$
$35 × \frac{4}{5} = 28$
$\frac{18}{5} ÷ \frac{9}{5} - \frac{1}{3} = \frac{5}{3}$
$\frac{15}{22} × \frac{11}{30} ÷ \frac{1}{2} = \frac{1}{2}$
$2 - \frac{1}{16} - \frac{15}{16} = 1$
$( \frac{3}{4} + \frac{1}{2} ) × 4 = 5$
结果统计:我夺了(40)面旗帜。