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$8÷\frac{5}{7}=$
$6÷\frac{7}{12}=$
$8÷\frac{7}{10}=$
$5÷\frac{10}{13}=$
$\frac{4}{9}÷\frac{1}{5}=$
$26÷\frac{13}{25}=$
$4÷\frac{5}{4}=$
$16÷\frac{4}{11}=$
$\frac{8}{9}÷\frac{1}{8}=$
$\frac{5}{7}÷\frac{4}{5}=$
$\frac{5}{12}÷\frac{3}{5}=$
$\frac{9}{13}÷\frac{1}{9}=$
$\frac{7}{12}÷\frac{2}{5}=$
$\frac{10}{11}÷\frac{1}{6}=$
$\frac{7}{10}÷\frac{3}{7}=$
$\frac{9}{14}÷\frac{5}{9}=$
$6÷\frac{7}{12}=$
$8÷\frac{7}{10}=$
$5÷\frac{10}{13}=$
$\frac{4}{9}÷\frac{1}{5}=$
$26÷\frac{13}{25}=$
$4÷\frac{5}{4}=$
$16÷\frac{4}{11}=$
$\frac{8}{9}÷\frac{1}{8}=$
$\frac{5}{7}÷\frac{4}{5}=$
$\frac{5}{12}÷\frac{3}{5}=$
$\frac{9}{13}÷\frac{1}{9}=$
$\frac{7}{12}÷\frac{2}{5}=$
$\frac{10}{11}÷\frac{1}{6}=$
$\frac{7}{10}÷\frac{3}{7}=$
$\frac{9}{14}÷\frac{5}{9}=$
答案
1. $8÷\frac{5}{7}=\frac{56}{5}$
$6÷\frac{7}{12}=\frac{72}{7}$
$8÷\frac{7}{10}=\frac{80}{7}$
$5÷\frac{10}{13}=\frac{13}{2}$
$\frac{4}{9}÷\frac{1}{5}=\frac{20}{9}$
$26÷\frac{13}{25}=50$
$4÷\frac{5}{4}=\frac{16}{5}$
$16÷\frac{4}{11}=44$
$\frac{8}{9}÷\frac{1}{8}=\frac{64}{9}$
$\frac{5}{7}÷\frac{4}{5}=\frac{25}{28}$
$\frac{5}{12}÷\frac{3}{5}=\frac{25}{36}$
$\frac{9}{13}÷\frac{1}{9}=\frac{81}{13}$
$\frac{7}{12}÷\frac{2}{5}=\frac{35}{24}$
$\frac{10}{11}÷\frac{1}{6}=\frac{60}{11}$
$\frac{7}{10}÷\frac{3}{7}=\frac{49}{30}$
$\frac{9}{14}÷\frac{5}{9}=\frac{81}{70}$
$6÷\frac{7}{12}=\frac{72}{7}$
$8÷\frac{7}{10}=\frac{80}{7}$
$5÷\frac{10}{13}=\frac{13}{2}$
$\frac{4}{9}÷\frac{1}{5}=\frac{20}{9}$
$26÷\frac{13}{25}=50$
$4÷\frac{5}{4}=\frac{16}{5}$
$16÷\frac{4}{11}=44$
$\frac{8}{9}÷\frac{1}{8}=\frac{64}{9}$
$\frac{5}{7}÷\frac{4}{5}=\frac{25}{28}$
$\frac{5}{12}÷\frac{3}{5}=\frac{25}{36}$
$\frac{9}{13}÷\frac{1}{9}=\frac{81}{13}$
$\frac{7}{12}÷\frac{2}{5}=\frac{35}{24}$
$\frac{10}{11}÷\frac{1}{6}=\frac{60}{11}$
$\frac{7}{10}÷\frac{3}{7}=\frac{49}{30}$
$\frac{9}{14}÷\frac{5}{9}=\frac{81}{70}$
18÷$\frac{9}{2}$=18○$\frac{( )}{( )}$=(
$\frac{4}{7}÷\frac{20}{21}=\frac{( )}{( )}○\frac{( )}{( )}=\frac{( )}{( )}$
$\frac{8}{9}÷\frac{16}{27}$
$\frac{19}{6}÷\frac{38}{3}$
$\frac{5}{13}÷\frac{15}{26}$
$\frac{3}{20}÷\frac{3}{16}$
$30÷\frac{18}{11}$
$\frac{20}{27}÷\frac{5}{9}$
$\frac{25}{18}÷\frac{5}{14}$
$\frac{13}{20}÷\frac{4}{5}$
$\frac{7}{6}÷\frac{35}{48}$
4
)$\frac{4}{7}÷\frac{20}{21}=\frac{( )}{( )}○\frac{( )}{( )}=\frac{( )}{( )}$
$\frac{8}{9}÷\frac{16}{27}$
$\frac{19}{6}÷\frac{38}{3}$
$\frac{5}{13}÷\frac{15}{26}$
$\frac{3}{20}÷\frac{3}{16}$
$30÷\frac{18}{11}$
$\frac{20}{27}÷\frac{5}{9}$
$\frac{25}{18}÷\frac{5}{14}$
$\frac{13}{20}÷\frac{4}{5}$
$\frac{7}{6}÷\frac{35}{48}$
答案
解：
根据分数除法的计算规则：除以一个不为0的数，等于乘这个数的倒数，计算如下：
1. $18÷\frac{9}{2}=18×\frac{2}{9}=4$
2. $\frac{4}{7}÷\frac{20}{21}=\frac{4}{7}×\frac{21}{20}=\frac{3}{5}$
3. $\frac{8}{9}÷\frac{16}{27}=\frac{8}{9}×\frac{27}{16}=\frac{3}{2}$
4. $\frac{19}{6}÷\frac{38}{3}=\frac{19}{6}×\frac{3}{38}=\frac{1}{4}$
5. $\frac{5}{13}÷\frac{15}{26}=\frac{5}{13}×\frac{26}{15}=\frac{2}{3}$
6. $\frac{3}{20}÷\frac{3}{16}=\frac{3}{20}×\frac{16}{3}=\frac{4}{5}$
7. $30÷\frac{18}{11}=30×\frac{11}{18}=\frac{55}{3}$
8. $\frac{20}{27}÷\frac{5}{9}=\frac{20}{27}×\frac{9}{5}=\frac{4}{3}$
9. $\frac{25}{18}÷\frac{5}{14}=\frac{25}{18}×\frac{14}{5}=\frac{35}{9}$
10. $\frac{13}{20}÷\frac{4}{5}=\frac{13}{20}×\frac{5}{4}=\frac{13}{16}$
11. $\frac{7}{6}÷\frac{35}{48}=\frac{7}{6}×\frac{48}{35}=\frac{8}{5}$
根据分数除法的计算规则：除以一个不为0的数，等于乘这个数的倒数，计算如下：
1. $18÷\frac{9}{2}=18×\frac{2}{9}=4$
2. $\frac{4}{7}÷\frac{20}{21}=\frac{4}{7}×\frac{21}{20}=\frac{3}{5}$
3. $\frac{8}{9}÷\frac{16}{27}=\frac{8}{9}×\frac{27}{16}=\frac{3}{2}$
4. $\frac{19}{6}÷\frac{38}{3}=\frac{19}{6}×\frac{3}{38}=\frac{1}{4}$
5. $\frac{5}{13}÷\frac{15}{26}=\frac{5}{13}×\frac{26}{15}=\frac{2}{3}$
6. $\frac{3}{20}÷\frac{3}{16}=\frac{3}{20}×\frac{16}{3}=\frac{4}{5}$
7. $30÷\frac{18}{11}=30×\frac{11}{18}=\frac{55}{3}$
8. $\frac{20}{27}÷\frac{5}{9}=\frac{20}{27}×\frac{9}{5}=\frac{4}{3}$
9. $\frac{25}{18}÷\frac{5}{14}=\frac{25}{18}×\frac{14}{5}=\frac{35}{9}$
10. $\frac{13}{20}÷\frac{4}{5}=\frac{13}{20}×\frac{5}{4}=\frac{13}{16}$
11. $\frac{7}{6}÷\frac{35}{48}=\frac{7}{6}×\frac{48}{35}=\frac{8}{5}$
拆分法 巧算。
$54\frac{2}{5} ÷ 17$
$= (51 + \frac{□}{□}) × \frac{1}{17}$
$=$
$=$
$23 ÷ 23\frac{23}{24}$
$54\frac{2}{5} ÷ 17$
$= (51 + \frac{□}{□}) × \frac{1}{17}$
$=$
$=$
$23 ÷ 23\frac{23}{24}$
答案
3. $54\frac{2}{5} ÷ 17$
$= (51 + \frac{17}{5}) × \frac{1}{17}$
$=51×\frac{1}{17}+\frac{17}{5}×\frac{1}{17}$
$=3\frac{1}{5}$
$23 ÷ 23\frac{23}{24}=\frac{24}{25}$
$= (51 + \frac{17}{5}) × \frac{1}{17}$
$=51×\frac{1}{17}+\frac{17}{5}×\frac{1}{17}$
$=3\frac{1}{5}$
$23 ÷ 23\frac{23}{24}=\frac{24}{25}$
