一、口算。
$21÷\frac {7}{9}=$
$4÷\frac {4}{9}=$
$6÷\frac {9}{10}=$
$8÷\frac {4}{5}=$
$14÷\frac {7}{8}=$
$13÷\frac {26}{27}=$
$6÷\frac {8}{9}=$
$11÷\frac {22}{27}=$
$9÷\frac {6}{17}=$
$21÷\frac {7}{5}=$
$4÷\frac {7}{4}=$
$15÷\frac {3}{7}=$
$18÷\frac {9}{10}=$
$12÷\frac {1}{40}=$
$20÷\frac {5}{6}=$
$21÷\frac {3}{8}=$
$30÷\frac {5}{6}=$
$22÷\frac {11}{12}=$
$3÷\frac {3}{5}=$
$20÷\frac {5}{8}=$
$12÷\frac {3}{4}=$
$21÷\frac {7}{9}=$
27
$4÷\frac {4}{9}=$
9
$6÷\frac {9}{10}=$
$\frac {20}{3}$
$8÷\frac {4}{5}=$
10
$14÷\frac {7}{8}=$
16
$13÷\frac {26}{27}=$
$\frac {27}{2}$
$6÷\frac {8}{9}=$
$\frac {27}{4}$
$11÷\frac {22}{27}=$
$\frac {27}{2}$
$9÷\frac {6}{17}=$
$\frac {51}{2}$
$21÷\frac {7}{5}=$
15
$4÷\frac {7}{4}=$
$\frac {16}{7}$
$15÷\frac {3}{7}=$
35
$18÷\frac {9}{10}=$
20
$12÷\frac {1}{40}=$
480
$20÷\frac {5}{6}=$
24
$21÷\frac {3}{8}=$
56
$30÷\frac {5}{6}=$
36
$22÷\frac {11}{12}=$
24
$3÷\frac {3}{5}=$
5
$20÷\frac {5}{8}=$
32
$12÷\frac {3}{4}=$
16
答案
一、27 9 $\frac {20}{3}$
10 16 $\frac {27}{2}$
$\frac {27}{4}$ $\frac {27}{2}$ $\frac {51}{2}$
15 $\frac {16}{7}$ 35
20 480 24
56 36 24
5 32 16
10 16 $\frac {27}{2}$
$\frac {27}{4}$ $\frac {27}{2}$ $\frac {51}{2}$
15 $\frac {16}{7}$ 35
20 480 24
56 36 24
5 32 16
二、算一算,比一比。
$\left\{\begin{array}{l} 2÷\frac {4}{5}= \\ 2×\frac {4}{5}= \end{array} \right. $
$\left\{\begin{array}{l} 3÷\frac {1}{4}= \\ 3×\frac {1}{4}= \end{array} \right. $
$\left\{\begin{array}{l} 15÷\frac {3}{10}= \\ 15×\frac {3}{10}= \end{array} \right. $
$\left\{\begin{array}{l} 6÷\frac {6}{5}= \\ \frac {6}{5}÷6= \end{array} \right. $
$\left\{\begin{array}{l} 4÷\frac {1}{5}= \\ \frac {1}{5}÷4= \end{array} \right. $
$\left\{\begin{array}{l} 12÷\frac {24}{23}= \\ \frac {24}{23}÷12= \end{array} \right. $
$\left\{\begin{array}{l} 2÷\frac {4}{5}= \\ 2×\frac {4}{5}= \end{array} \right. $
$\left\{\begin{array}{l} 3÷\frac {1}{4}= \\ 3×\frac {1}{4}= \end{array} \right. $
$\left\{\begin{array}{l} 15÷\frac {3}{10}= \\ 15×\frac {3}{10}= \end{array} \right. $
$\left\{\begin{array}{l} 6÷\frac {6}{5}= \\ \frac {6}{5}÷6= \end{array} \right. $
$\left\{\begin{array}{l} 4÷\frac {1}{5}= \\ \frac {1}{5}÷4= \end{array} \right. $
$\left\{\begin{array}{l} 12÷\frac {24}{23}= \\ \frac {24}{23}÷12= \end{array} \right. $
答案
二、$\frac {5}{2}$ $\frac {8}{5}$
12 $\frac {3}{4}$
50 $\frac {9}{2}$
5 $\frac {1}{5}$
20 $\frac {1}{20}$
$\frac {23}{2}$ $\frac {2}{23}$
12 $\frac {3}{4}$
50 $\frac {9}{2}$
5 $\frac {1}{5}$
20 $\frac {1}{20}$
$\frac {23}{2}$ $\frac {2}{23}$
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