2026年计算素养提升五年级数学下册北师大版第61页答案
1. 直接写出得数。
$\frac{5}{6}÷2=$ $\frac{4}{9}÷3=$ $\frac{4}{5}÷3=$
$\frac{5}{9}÷2=$ $\frac{7}{12}÷21=$ $\frac{9}{14}÷21=$
$\frac{5}{9}÷3=$ $\frac{7}{10}÷4=$ $\frac{11}{12}÷5=$
$\frac{14}{15}÷7=$ $\frac{3}{7}÷12=$ $\frac{2}{3}÷3=$
$\frac{1}{6}÷5=$ $\frac{6}{13}÷3=$ $\frac{3}{8}÷10=$
$\frac{3}{4}÷3=$ $\frac{1}{3}÷7=$ $\frac{4}{5}÷2=$
$\frac{9}{17}÷3=$ $\frac{5}{21}÷5=$ $\frac{7}{12}÷10=$
$\frac{3}{5}÷4=$ $\frac{1}{4}÷6=$ $\frac{5}{9}÷2=$

答案

$\frac{5}{6}÷2=\frac{5}{12}$ $\frac{4}{9}÷3=\frac{4}{27}$ $\frac{4}{5}÷3=\frac{4}{15}$
$\frac{5}{9}÷2=\frac{5}{18}$ $\frac{7}{12}÷21=\frac{1}{36}$ $\frac{9}{14}÷21=\frac{3}{98}$
$\frac{5}{9}÷3=\frac{5}{27}$ $\frac{7}{10}÷4=\frac{7}{40}$ $\frac{11}{12}÷5=\frac{11}{60}$
$\frac{14}{15}÷7=\frac{2}{15}$ $\frac{3}{7}÷12=\frac{1}{28}$ $\frac{2}{3}÷3=\frac{2}{9}$
$\frac{1}{6}÷5=\frac{1}{30}$ $\frac{6}{13}÷3=\frac{2}{13}$ $\frac{3}{8}÷10=\frac{3}{80}$
$\frac{3}{4}÷3=\frac{1}{4}$ $\frac{1}{3}÷7=\frac{1}{21}$ $\frac{4}{5}÷2=\frac{2}{5}$
$\frac{9}{17}÷3=\frac{3}{17}$ $\frac{5}{21}÷5=\frac{1}{21}$ $\frac{7}{12}÷10=\frac{7}{120}$
$\frac{3}{5}÷4=\frac{3}{20}$ $\frac{1}{4}÷6=\frac{1}{24}$ $\frac{5}{9}÷2=\frac{5}{18}$
2. 填空。
$\frac{4}{9}÷2=\frac{4÷2}{9}=$(
) $\frac{6}{7}÷5=\frac{6}{7}×$(
)=(

$\frac{6}{7}÷3=\frac{6÷(\_\_\_\_\_\_)}{7}=$(
) $\frac{8}{13}÷7=\frac{8}{13}×$(
)=(

$\frac{15}{13}÷5=\frac{15÷(\_\_\_\_\_\_)}{13}=$(
) $\frac{2}{3}÷7=\frac{2}{3}×$(
)=(

$\frac{21}{11}÷3=\frac{21÷(\_\_\_\_\_\_)}{11}=$(
) $\frac{45}{8}÷5=\frac{45÷(\_\_\_\_\_\_)}{8}=$(

$\frac{36}{13}÷4=\frac{36÷(\_\_\_\_\_\_)}{13}=$(
) $\frac{25}{14}÷5=\frac{25÷(\_\_\_\_\_\_)}{14}=$(

$\frac{3}{17}÷3=\frac{3}{17}×$(
)=(
) $\frac{5}{14}÷7=\frac{5}{14}×$(
)=(

$\frac{7}{12}÷3=\frac{7}{12}×$(
)=(
) $\frac{11}{18}÷2=\frac{11}{18}×$(
)=(

$\frac{13}{20}÷4=\frac{13}{20}×$(
)=(
) $\frac{18}{19}÷3=\frac{18}{19}×$(
)=(

答案

$\frac{2}{9}$;$\frac{1}{5}$,$\frac{6}{35}$;3,$\frac{2}{7}$;$\frac{1}{7}$,$\frac{8}{91}$;5,$\frac{3}{13}$;$\frac{1}{7}$,$\frac{2}{21}$;3,$\frac{7}{11}$;5,$\frac{9}{8}$;4,$\frac{9}{13}$;5,$\frac{5}{14}$;$\frac{1}{3}$,$\frac{1}{17}$;$\frac{1}{7}$,$\frac{5}{98}$;$\frac{1}{3}$,$\frac{7}{36}$;$\frac{1}{2}$,$\frac{11}{36}$;$\frac{1}{4}$,$\frac{13}{80}$;$\frac{1}{3}$,$\frac{6}{19}$

解析

分数除以整数有两种计算方法:1. 若分子能被整数整除,直接用分子除以整数,分母不变;2. 转化为分数乘这个整数的倒数,再按分数乘法法则计算。具体计算如下:
1. $\frac{4}{9}÷2=\frac{4÷2}{9}=\frac{2}{9}$;
2. $\frac{6}{7}÷5=\frac{6}{7}×\frac{1}{5}=\frac{6}{35}$;
3. $\frac{6}{7}÷3=\frac{6÷3}{7}=\frac{2}{7}$;
4. $\frac{8}{13}÷7=\frac{8}{13}×\frac{1}{7}=\frac{8}{91}$;
5. $\frac{15}{13}÷5=\frac{15÷5}{13}=\frac{3}{13}$;
6. $\frac{2}{3}÷7=\frac{2}{3}×\frac{1}{7}=\frac{2}{21}$;
7. $\frac{21}{11}÷3=\frac{21÷3}{11}=\frac{7}{11}$;
8. $\frac{45}{8}÷5=\frac{45÷5}{8}=\frac{9}{8}$;
9. $\frac{36}{13}÷4=\frac{36÷4}{13}=\frac{9}{13}$;
10. $\frac{25}{14}÷5=\frac{25÷5}{14}=\frac{5}{14}$;
11. $\frac{3}{17}÷3=\frac{3}{17}×\frac{1}{3}=\frac{1}{17}$;
12. $\frac{5}{14}÷7=\frac{5}{14}×\frac{1}{7}=\frac{5}{98}$;
13. $\frac{7}{12}÷3=\frac{7}{12}×\frac{1}{3}=\frac{7}{36}$;
14. $\frac{11}{18}÷2=\frac{11}{18}×\frac{1}{2}=\frac{11}{36}$;
15. $\frac{13}{20}÷4=\frac{13}{20}×\frac{1}{4}=\frac{13}{80}$;
16. $\frac{18}{19}÷3=\frac{18}{19}×\frac{1}{3}=\frac{6}{19}$。