一、直接写出得数。
$\frac{7}{10} - \frac{7}{10} =$
$1 - \frac{4}{12} =$
$\frac{7}{9} + \frac{2}{9} =$
$\frac{1}{7} + \frac{1}{7} =$
$1 - \frac{5}{13} =$
$\frac{3}{5} + \frac{2}{5} =$
$\frac{8}{11} - \frac{2}{11} =$
$1 - \frac{4}{5} =$
$\frac{1}{15} + \frac{2}{15} =$
$\frac{4}{12} + \frac{4}{12} =$
$1 - \frac{7}{9} =$
$\frac{7}{10} - \frac{3}{10} =$
$\frac{5}{12} + \frac{7}{12} =$
$\frac{6}{10} + \frac{3}{10} =$
$1 - \frac{2}{11} =$
$\frac{9}{11} - \frac{3}{11} =$
$\frac{7}{11} - \frac{4}{11} =$
$\frac{9}{10} - \frac{1}{10} =$
$\frac{7}{8} - \frac{1}{8} =$
$\frac{2}{10} + \frac{1}{10} =$
$\frac{5}{6} - \frac{4}{6} =$
$\frac{4}{8} - \frac{2}{8} =$
$\frac{3}{10} - \frac{2}{10} =$
$\frac{1}{4} - \frac{1}{4} =$
$\frac{6}{9} - \frac{3}{9} =$
$\frac{3}{8} - \frac{1}{8} =$
$\frac{2}{7} + \frac{3}{7} =$
$\frac{3}{7} + \frac{3}{7} =$
$\frac{7}{10} - \frac{7}{10} =$
$1 - \frac{4}{12} =$
$\frac{7}{9} + \frac{2}{9} =$
$\frac{1}{7} + \frac{1}{7} =$
$1 - \frac{5}{13} =$
$\frac{3}{5} + \frac{2}{5} =$
$\frac{8}{11} - \frac{2}{11} =$
$1 - \frac{4}{5} =$
$\frac{1}{15} + \frac{2}{15} =$
$\frac{4}{12} + \frac{4}{12} =$
$1 - \frac{7}{9} =$
$\frac{7}{10} - \frac{3}{10} =$
$\frac{5}{12} + \frac{7}{12} =$
$\frac{6}{10} + \frac{3}{10} =$
$1 - \frac{2}{11} =$
$\frac{9}{11} - \frac{3}{11} =$
$\frac{7}{11} - \frac{4}{11} =$
$\frac{9}{10} - \frac{1}{10} =$
$\frac{7}{8} - \frac{1}{8} =$
$\frac{2}{10} + \frac{1}{10} =$
$\frac{5}{6} - \frac{4}{6} =$
$\frac{4}{8} - \frac{2}{8} =$
$\frac{3}{10} - \frac{2}{10} =$
$\frac{1}{4} - \frac{1}{4} =$
$\frac{6}{9} - \frac{3}{9} =$
$\frac{3}{8} - \frac{1}{8} =$
$\frac{2}{7} + \frac{3}{7} =$
$\frac{3}{7} + \frac{3}{7} =$
答案
1. 0
2. $\frac{8}{12}$
3. 1
4. $\frac{2}{7}$
5. $\frac{8}{13}$
6. 1
7. $\frac{6}{11}$
8. $\frac{1}{5}$
9. $\frac{3}{15}$
10. $\frac{8}{12}$
11. $\frac{2}{9}$
12. $\frac{4}{10}$
13. 1
14. $\frac{9}{10}$
15. $\frac{9}{11}$
16. $\frac{6}{11}$
17. $\frac{3}{11}$
18. $\frac{8}{10}$
19. $\frac{6}{8}$
20. $\frac{3}{10}$
21. $\frac{1}{6}$
22. $\frac{2}{8}$
23. $\frac{1}{10}$
24. 0
25. $\frac{3}{9}$
26. $\frac{2}{8}$
27. $\frac{5}{7}$
28. $\frac{6}{7}$
2. $\frac{8}{12}$
3. 1
4. $\frac{2}{7}$
5. $\frac{8}{13}$
6. 1
7. $\frac{6}{11}$
8. $\frac{1}{5}$
9. $\frac{3}{15}$
10. $\frac{8}{12}$
11. $\frac{2}{9}$
12. $\frac{4}{10}$
13. 1
14. $\frac{9}{10}$
15. $\frac{9}{11}$
16. $\frac{6}{11}$
17. $\frac{3}{11}$
18. $\frac{8}{10}$
19. $\frac{6}{8}$
20. $\frac{3}{10}$
21. $\frac{1}{6}$
22. $\frac{2}{8}$
23. $\frac{1}{10}$
24. 0
25. $\frac{3}{9}$
26. $\frac{2}{8}$
27. $\frac{5}{7}$
28. $\frac{6}{7}$
二、在括号里填上合适的数。
$\frac{6}{11}+( )=1$
$\frac{7}{10}+( )=\frac{9}{10}$
$1-( )=\frac{2}{13}$
$( )-\frac{2}{8}=\frac{5}{8}$
$( )+\frac{2}{9}=\frac{7}{9}$
$\frac{12}{12}-( )=\frac{5}{12}$
$\frac{6}{11}+( )=1$
$\frac{7}{10}+( )=\frac{9}{10}$
$1-( )=\frac{2}{13}$
$( )-\frac{2}{8}=\frac{5}{8}$
$( )+\frac{2}{9}=\frac{7}{9}$
$\frac{12}{12}-( )=\frac{5}{12}$
答案
1. $\frac{5}{11}$
2. $\frac{2}{10}$
3. $\frac{11}{13}$
4. $\frac{7}{8}$
5. $\frac{5}{9}$
6. $\frac{7}{12}$
2. $\frac{2}{10}$
3. $\frac{11}{13}$
4. $\frac{7}{8}$
5. $\frac{5}{9}$
6. $\frac{7}{12}$
三、妈妈买了一盒麻薯,一共有 12 个,丽丽吃了其中的$\frac{1}{3}$,剩下的分给了妹妹。妹妹吃了(
1.
2.
3.
4.
5.
6.
7.
8.
8
)个麻薯。1.
2.
3.
4.
5.
6.
7.
8.
答案
8
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