① 计算下面各题。
$\frac{1}{3}×\frac{6}{7}=$
$\frac{2}{3}×\frac{9}{5}=$
$\frac{5}{6}÷5=$
$4÷\frac{4}{5}=$
$\frac{5}{8}÷\frac{7}{3}=$
$\frac{1}{2}÷\frac{2}{5}=$
$\frac{5}{16}×3=$
$8×\frac{1}{9}=$
$\frac{1}{6}÷\frac{1}{3}=$
$\frac{3}{5}÷2=$
$\frac{3}{8}÷6=$
$4÷\frac{1}{2}=$
$\frac{1}{3}+\frac{1}{4}=$
$\frac{1}{7}-\frac{1}{8}=$
$\frac{6}{25}÷\frac{3}{5}=$
$\frac{1}{3}×\frac{6}{7}=$
$\frac{2}{3}×\frac{9}{5}=$
$\frac{5}{6}÷5=$
$4÷\frac{4}{5}=$
$\frac{5}{8}÷\frac{7}{3}=$
$\frac{1}{2}÷\frac{2}{5}=$
$\frac{5}{16}×3=$
$8×\frac{1}{9}=$
$\frac{1}{6}÷\frac{1}{3}=$
$\frac{3}{5}÷2=$
$\frac{3}{8}÷6=$
$4÷\frac{1}{2}=$
$\frac{1}{3}+\frac{1}{4}=$
$\frac{1}{7}-\frac{1}{8}=$
$\frac{6}{25}÷\frac{3}{5}=$
答案:
$\frac{2}{7}$;$\frac{6}{5}$;$\frac{1}{6}$;5;$\frac{15}{56}$;$\frac{5}{4}$;$\frac{15}{16}$;$\frac{8}{9}$;$\frac{1}{2}$;$\frac{3}{10}$;$\frac{1}{16}$;8;$\frac{7}{12}$;$\frac{1}{56}$;$\frac{2}{5}$
② 算一算,填一填。
$( )×8=\frac{1}{2}$
$( )÷8=\frac{1}{2}$
$( )×9=\frac{1}{18}$
$\frac{1}{9}×( )=\frac{1}{27}$
$15÷( )=\frac{3}{4}$
$17×( )=\frac{17}{19}$
$8×( )=\frac{3}{4}$
$7÷( )=\frac{1}{3}$
$13×( )=\frac{26}{17}$
$( )×\frac{1}{2}=\frac{7}{8}$
$( )÷\frac{2}{3}=\frac{5}{12}$
$( )×\frac{5}{9}=\frac{1}{3}$
$( )×8=\frac{1}{2}$
$( )÷8=\frac{1}{2}$
$( )×9=\frac{1}{18}$
$\frac{1}{9}×( )=\frac{1}{27}$
$15÷( )=\frac{3}{4}$
$17×( )=\frac{17}{19}$
$8×( )=\frac{3}{4}$
$7÷( )=\frac{1}{3}$
$13×( )=\frac{26}{17}$
$( )×\frac{1}{2}=\frac{7}{8}$
$( )÷\frac{2}{3}=\frac{5}{12}$
$( )×\frac{5}{9}=\frac{1}{3}$
答案:
$\frac{1}{16}$;4;$\frac{1}{162}$;$\frac{1}{3}$;20;$\frac{1}{19}$;$\frac{3}{32}$;21;$\frac{2}{17}$;$\frac{7}{4}$;$\frac{5}{18}$;$\frac{3}{5}$
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