1.直接写出得数。
$\frac{1}{3} ÷ \frac{1}{4} =$
$0.2 ÷ \frac{1}{5} =$
$\frac{3}{5} ÷ \frac{2}{5} =$
$0 ÷ \frac{2}{13} =$
$\frac{7}{8} ÷ \frac{1}{4} =$
$1 ÷ \frac{3}{14} =$
$\frac{5}{8} ÷ \frac{5}{16} =$
$4 ÷ \frac{1}{25} =$
$\frac{1}{3} ÷ \frac{1}{4} =$
$0.2 ÷ \frac{1}{5} =$
$\frac{3}{5} ÷ \frac{2}{5} =$
$0 ÷ \frac{2}{13} =$
$\frac{7}{8} ÷ \frac{1}{4} =$
$1 ÷ \frac{3}{14} =$
$\frac{5}{8} ÷ \frac{5}{16} =$
$4 ÷ \frac{1}{25} =$
答案
$\frac{4}{3}$、$1$、$\frac{3}{2}$、$0$、$\frac{7}{2}$、$\frac{14}{3}$、$2$、$100$
2.计算下面各题。
$15÷\frac{25}{9}=15◯\frac{(\quad)}{(\quad)}=\frac{(\quad)}{(\quad)}$
$\frac{8}{9}÷\frac{16}{27}=\frac{(\quad)}{(\quad)}◯\frac{(\quad)}{(\quad)}=\frac{(\quad)}{(\quad)}$
$\frac{14}{9}÷\frac{7}{30}$
$45÷\frac{9}{14}$
$\frac{19}{22}÷\frac{38}{33}$
$\frac{4}{27}÷\frac{28}{45}$
$\frac{24}{35}÷\frac{6}{7}$
$72÷\frac{16}{5}$
$15÷\frac{25}{9}=15◯\frac{(\quad)}{(\quad)}=\frac{(\quad)}{(\quad)}$
$\frac{8}{9}÷\frac{16}{27}=\frac{(\quad)}{(\quad)}◯\frac{(\quad)}{(\quad)}=\frac{(\quad)}{(\quad)}$
$\frac{14}{9}÷\frac{7}{30}$
$45÷\frac{9}{14}$
$\frac{19}{22}÷\frac{38}{33}$
$\frac{4}{27}÷\frac{28}{45}$
$\frac{24}{35}÷\frac{6}{7}$
$72÷\frac{16}{5}$
答案
$15÷\frac{25}{9}=15×\frac{9}{25}=\frac{27}{5}$
$\frac{8}{9}÷\frac{16}{27}=\frac{8}{9}×\frac{27}{16}=\frac{3}{2}$
$\frac{14}{9}÷\frac{7}{30}=\frac{20}{3}$
$45÷\frac{9}{14}=70$
$\frac{19}{22}÷\frac{38}{33}=\frac{3}{4}$
$\frac{4}{27}÷\frac{28}{45}=\frac{5}{21}$
$\frac{24}{35}÷\frac{6}{7}=\frac{4}{5}$
$72÷\frac{16}{5}=\frac{45}{2}$
$\frac{8}{9}÷\frac{16}{27}=\frac{8}{9}×\frac{27}{16}=\frac{3}{2}$
$\frac{14}{9}÷\frac{7}{30}=\frac{20}{3}$
$45÷\frac{9}{14}=70$
$\frac{19}{22}÷\frac{38}{33}=\frac{3}{4}$
$\frac{4}{27}÷\frac{28}{45}=\frac{5}{21}$
$\frac{24}{35}÷\frac{6}{7}=\frac{4}{5}$
$72÷\frac{16}{5}=\frac{45}{2}$
3.计算下面各题,能简算的要简算。
$\frac{2}{5}÷\frac{3}{10}÷\frac{7}{6}$
$\frac{18}{7}-\frac{1}{2}÷\frac{3}{4}-\frac{1}{3}$
$6÷\frac{4}{9}×\frac{8}{27}$
$\frac{2}{5}÷\frac{3}{10}÷\frac{7}{6}$
$\frac{18}{7}-\frac{1}{2}÷\frac{3}{4}-\frac{1}{3}$
$6÷\frac{4}{9}×\frac{8}{27}$
答案
$\frac{2}{5}÷\frac{3}{10}÷\frac{7}{6}=\frac{8}{7}$
$\frac{18}{7}-\frac{1}{2}÷\frac{3}{4}-\frac{1}{3}=\frac{11}{7}$
$6÷\frac{4}{9}×\frac{8}{27}=4$
$\frac{18}{7}-\frac{1}{2}÷\frac{3}{4}-\frac{1}{3}=\frac{11}{7}$
$6÷\frac{4}{9}×\frac{8}{27}=4$
4.在$◯$里填上“>”“<”或“=”。
$12÷\frac{3}{2} ◯ 12$
$\frac{14}{15}÷\frac{2}{5} ◯ \frac{14}{15}$
$\frac{11}{8}÷\frac{1}{7} ◯ \frac{11}{8}×7$
$\frac{13}{14}÷1 ◯ \frac{13}{14}$
$\frac{5}{8}÷\frac{7}{12} ◯ \frac{5}{8}$
$\frac{10}{21}×\frac{3}{5} ◯ \frac{10}{21}÷\frac{3}{5}$
$12÷\frac{3}{2} ◯ 12$
$\frac{14}{15}÷\frac{2}{5} ◯ \frac{14}{15}$
$\frac{11}{8}÷\frac{1}{7} ◯ \frac{11}{8}×7$
$\frac{13}{14}÷1 ◯ \frac{13}{14}$
$\frac{5}{8}÷\frac{7}{12} ◯ \frac{5}{8}$
$\frac{10}{21}×\frac{3}{5} ◯ \frac{10}{21}÷\frac{3}{5}$
答案
$12÷\frac{3}{2} < 12$
$\frac{14}{15}÷\frac{2}{5} > \frac{14}{15}$
$\frac{11}{8}÷\frac{1}{7} = \frac{11}{8}×7$
$\frac{13}{14}÷1 = \frac{13}{14}$
$\frac{5}{8}÷\frac{7}{12} > \frac{5}{8}$
$\frac{10}{21}×\frac{3}{5} < \frac{10}{21}÷\frac{3}{5}$
$\frac{14}{15}÷\frac{2}{5} > \frac{14}{15}$
$\frac{11}{8}÷\frac{1}{7} = \frac{11}{8}×7$
$\frac{13}{14}÷1 = \frac{13}{14}$
$\frac{5}{8}÷\frac{7}{12} > \frac{5}{8}$
$\frac{10}{21}×\frac{3}{5} < \frac{10}{21}÷\frac{3}{5}$
5.周末,欢欢和乐乐相约去郊外徒步锻炼。徒步过程中,欢欢$\frac{2}{3}$小时走了2千米,乐乐$\frac{5}{12}$小时走了$\frac{5}{6}$千米,谁的速度更快?
答案
$2÷\frac{2}{3}=3$(千米/时) $\frac{5}{6}÷\frac{5}{12}=2$(千米/时) $3>2$
答:欢欢的速度更快。
答:欢欢的速度更快。
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