1. $\frac{8}{11} ÷ \frac{9}{11} =$__÷__=$\frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}$ $\frac{3}{8} ÷ \frac{5}{6} = \frac{\_\_\_\_\_\_}{24} ÷ \frac{\_\_\_\_\_\_}{24} = \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}$
$\frac{3}{4} ÷ \frac{6}{7} = (\frac{3}{4} × \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}) ÷ (\frac{6}{7} × \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}) = \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}$

$\frac{3}{4} ÷ \frac{6}{7} = (\frac{3}{4} × \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}) ÷ (\frac{6}{7} × \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}) = \frac{\_\_\_\_\_\_}{\_\_\_\_\_\_}$
答案
2. 把结果相等的算式用线连起来。
$\frac{2}{3} ÷ 4$ $\frac{3}{7} ÷ 4$ $\frac{8}{9} ÷ 4$ $\frac{8}{5} ÷ 4$
$\frac{3}{7} × \frac{1}{4}$ $\frac{8}{5 × 4}$ $\frac{2}{3} × \frac{1}{4}$ $\frac{8}{9} × \frac{1}{4}$

$\frac{2}{3} ÷ 4$ $\frac{3}{7} ÷ 4$ $\frac{8}{9} ÷ 4$ $\frac{8}{5} ÷ 4$
$\frac{3}{7} × \frac{1}{4}$ $\frac{8}{5 × 4}$ $\frac{2}{3} × \frac{1}{4}$ $\frac{8}{9} × \frac{1}{4}$
答案
$\frac {1}{7}$
$\frac {4}{3}$
$\frac {2}{17}$
20
$\frac {7}{6}$
2
$\frac {1}{2}$
$\frac {3}{2}$
$\frac {6}{5}$
$\frac {9}{4}$
$\frac {21}{20}$
$\frac {6}{5}$
3. $\frac{14}{17} ÷ 7 = \frac{14}{17} × ( )$ $15 ÷ \frac{3}{4} = 15 × ( )$
$= ( )$ $= ( )$
$\frac{3}{7} ÷ \frac{6}{7} = \frac{3}{7} × ( )$ $\frac{3}{4} ÷ \frac{1}{2} = \frac{3}{4} × ( )$
$= ( )$ $= ( )$
$\frac{7}{8} ÷ \frac{5}{6} = \frac{7}{8} × ( )$ $\frac{8}{15} ÷ \frac{4}{9} = \frac{8}{15} × ( )$
$= ( )$ $= ( )$
$= ( )$ $= ( )$
$\frac{3}{7} ÷ \frac{6}{7} = \frac{3}{7} × ( )$ $\frac{3}{4} ÷ \frac{1}{2} = \frac{3}{4} × ( )$
$= ( )$ $= ( )$
$\frac{7}{8} ÷ \frac{5}{6} = \frac{7}{8} × ( )$ $\frac{8}{15} ÷ \frac{4}{9} = \frac{8}{15} × ( )$
$= ( )$ $= ( )$
答案
4. 计算。
$\frac{11}{12} ÷ \frac{5}{9}$ $\frac{10}{21} ÷ \frac{5}{7}$ $\frac{15}{28} ÷ \frac{3}{4}$ $\frac{7}{8} ÷ \frac{2}{3}$
$\frac{11}{12} ÷ \frac{5}{9}$ $\frac{10}{21} ÷ \frac{5}{7}$ $\frac{15}{28} ÷ \frac{3}{4}$ $\frac{7}{8} ÷ \frac{2}{3}$
答案
$=\frac {11}{12}×\frac {9}{5}$
$=\frac {33}{20}$
$=\frac {10}{21}×\frac {7}{5}$
$=\frac {2}{3}$
$=\frac {15}{28}×\frac {4}{3}$
$=\frac {5}{7}$
$=\frac {7}{8}×\frac {3}{2}$
$=\frac {21}{16}$
$=\frac {33}{20}$
$=\frac {10}{21}×\frac {7}{5}$
$=\frac {2}{3}$
$=\frac {15}{28}×\frac {4}{3}$
$=\frac {5}{7}$
$=\frac {7}{8}×\frac {3}{2}$
$=\frac {21}{16}$
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