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一、直接写出得数。
$8÷\frac{8}{9}=$
$9÷\frac{2}{3}=$
$10÷\frac{2}{5}=$
$11÷\frac{11}{12}=$
$12÷\frac{4}{5}=$
$12÷\frac{6}{7}=$
$12÷\frac{8}{9}=$
$14÷\frac{2}{5}=$
$14÷\frac{2}{7}=$
$15÷\frac{5}{12}=$
$15÷\frac{6}{7}=$
$16÷\frac{6}{7}=$
$18÷\frac{8}{9}=$
$18÷\frac{4}{7}=$
$20÷\frac{8}{9}=$
$4÷\frac{2}{3}=$
$4÷\frac{1}{3}=$
$30÷\frac{3}{8}=$
$\frac{3}{4}÷\frac{3}{8}=$
$\frac{5}{14}÷\frac{10}{21}=$
$\frac{5}{12}÷\frac{7}{12}=$
$39÷\frac{13}{15}=$
$\frac{5}{6}÷\frac{20}{21}=$
$\frac{8}{15}÷\frac{4}{5}=$
$\frac{13}{43}÷\frac{39}{43}=$
$\frac{1}{3}÷\frac{1}{5}=$
$\frac{1}{3}÷\frac{1}{27}=$
$\frac{2}{5}÷\frac{2}{9}=$
$8÷\frac{8}{9}=$
$9÷\frac{2}{3}=$
$10÷\frac{2}{5}=$
$11÷\frac{11}{12}=$
$12÷\frac{4}{5}=$
$12÷\frac{6}{7}=$
$12÷\frac{8}{9}=$
$14÷\frac{2}{5}=$
$14÷\frac{2}{7}=$
$15÷\frac{5}{12}=$
$15÷\frac{6}{7}=$
$16÷\frac{6}{7}=$
$18÷\frac{8}{9}=$
$18÷\frac{4}{7}=$
$20÷\frac{8}{9}=$
$4÷\frac{2}{3}=$
$4÷\frac{1}{3}=$
$30÷\frac{3}{8}=$
$\frac{3}{4}÷\frac{3}{8}=$
$\frac{5}{14}÷\frac{10}{21}=$
$\frac{5}{12}÷\frac{7}{12}=$
$39÷\frac{13}{15}=$
$\frac{5}{6}÷\frac{20}{21}=$
$\frac{8}{15}÷\frac{4}{5}=$
$\frac{13}{43}÷\frac{39}{43}=$
$\frac{1}{3}÷\frac{1}{5}=$
$\frac{1}{3}÷\frac{1}{27}=$
$\frac{2}{5}÷\frac{2}{9}=$
答案
1. $8÷\frac{8}{9}=9$
2. $9÷\frac{2}{3}=\frac{27}{2}$
3. $10÷\frac{2}{5}=25$
4. $11÷\frac{11}{12}=12$
5. $12÷\frac{4}{5}=15$
6. $12÷\frac{6}{7}=14$
7. $12÷\frac{8}{9}=\frac{27}{2}$
8. $14÷\frac{2}{5}=35$
9. $14÷\frac{2}{7}=49$
10. $15÷\frac{5}{12}=36$
11. $15÷\frac{6}{7}=\frac{35}{2}$
12. $16÷\frac{6}{7}=\frac{56}{3}$
13. $18÷\frac{8}{9}=\frac{81}{4}$
14. $18÷\frac{4}{7}=\frac{63}{2}$
15. $20÷\frac{8}{9}=\frac{45}{2}$
16. $4÷\frac{2}{3}=6$
17. $4÷\frac{1}{3}=12$
18. $30÷\frac{3}{8}=80$
19. $\frac{3}{4}÷\frac{3}{8}=2$
20. $\frac{5}{14}÷\frac{10}{21}=\frac{3}{4}$
21. $\frac{5}{12}÷\frac{7}{12}=\frac{5}{7}$
22. $39÷\frac{13}{15}=45$
23. $\frac{5}{6}÷\frac{20}{21}=\frac{7}{8}$
24. $\frac{8}{15}÷\frac{4}{5}=\frac{2}{3}$
25. $\frac{13}{43}÷\frac{39}{43}=\frac{1}{3}$
26. $\frac{1}{3}÷\frac{1}{5}=\frac{5}{3}$
27. $\frac{1}{3}÷\frac{1}{27}=9$
28. $\frac{2}{5}÷\frac{2}{9}=\frac{9}{5}$
2. $9÷\frac{2}{3}=\frac{27}{2}$
3. $10÷\frac{2}{5}=25$
4. $11÷\frac{11}{12}=12$
5. $12÷\frac{4}{5}=15$
6. $12÷\frac{6}{7}=14$
7. $12÷\frac{8}{9}=\frac{27}{2}$
8. $14÷\frac{2}{5}=35$
9. $14÷\frac{2}{7}=49$
10. $15÷\frac{5}{12}=36$
11. $15÷\frac{6}{7}=\frac{35}{2}$
12. $16÷\frac{6}{7}=\frac{56}{3}$
13. $18÷\frac{8}{9}=\frac{81}{4}$
14. $18÷\frac{4}{7}=\frac{63}{2}$
15. $20÷\frac{8}{9}=\frac{45}{2}$
16. $4÷\frac{2}{3}=6$
17. $4÷\frac{1}{3}=12$
18. $30÷\frac{3}{8}=80$
19. $\frac{3}{4}÷\frac{3}{8}=2$
20. $\frac{5}{14}÷\frac{10}{21}=\frac{3}{4}$
21. $\frac{5}{12}÷\frac{7}{12}=\frac{5}{7}$
22. $39÷\frac{13}{15}=45$
23. $\frac{5}{6}÷\frac{20}{21}=\frac{7}{8}$
24. $\frac{8}{15}÷\frac{4}{5}=\frac{2}{3}$
25. $\frac{13}{43}÷\frac{39}{43}=\frac{1}{3}$
26. $\frac{1}{3}÷\frac{1}{5}=\frac{5}{3}$
27. $\frac{1}{3}÷\frac{1}{27}=9$
28. $\frac{2}{5}÷\frac{2}{9}=\frac{9}{5}$
二、计算下面各题，能简算的要简算。
$12 - \frac{4}{5} ÷ \frac{7}{15}$
$\frac{3}{8} ÷ 4 + \frac{5}{8} ÷ 4$
$\frac{4}{5} ÷ (\frac{1}{8} ÷ \frac{5}{8})$
$12 - \frac{4}{5} ÷ \frac{7}{15}$
$\frac{3}{8} ÷ 4 + \frac{5}{8} ÷ 4$
$\frac{4}{5} ÷ (\frac{1}{8} ÷ \frac{5}{8})$
答案
1. $12 - \frac{4}{5} ÷ \frac{7}{15}=\frac{72}{7}$
2. $\frac{3}{8} ÷ 4 + \frac{5}{8} ÷ 4=\frac{1}{4}$
3. $\frac{4}{5} ÷ (\frac{1}{8} ÷ \frac{5}{8})=4$
2. $\frac{3}{8} ÷ 4 + \frac{5}{8} ÷ 4=\frac{1}{4}$
3. $\frac{4}{5} ÷ (\frac{1}{8} ÷ \frac{5}{8})=4$
三、先分别在下图中分一分，再写出结果。
1.
$4÷\frac{1}{2}=4×(\quad)=(\quad)$
2.
$5÷\frac{1}{3}=5×(\quad)=(\quad)$
1.
$4÷\frac{1}{2}=4×(\quad)=(\quad)$
2.
$5÷\frac{1}{3}=5×(\quad)=(\quad)$
答案
1. 分图见
，$4÷\frac{1}{2}=4×2=8$2. 分图见
，$5÷\frac{1}{3}=5×3=15$四、实验班原创 推理意识 如果$A=1÷(\frac{1}{90}+\frac{1}{91}+\frac{1}{92}+\dots+\frac{1}{98}+\frac{1}{99})$，那么A的整数部分是（
1. 2. 3. 4.
5. 6. 7. 8.
9
）。1. 2. 3. 4.
5. 6. 7. 8.
答案
9
