《2025年口算基础训练六年级数学上册人教版》

1
计算
$\frac{3}{8}+\frac{5}{8}= $1
$\frac{4}{9}+\frac{1}{9}= $$\frac{5}{9}$
$\frac{2}{6}+\frac{3}{6}= $$\frac{5}{6}$
$\frac{7}{5}+\frac{2}{5}= $$\frac{9}{5}$
$\frac{3}{16}+\frac{4}{16}= $$\frac{7}{16}$
$\frac{5}{11}-\frac{2}{11}= $$\frac{3}{11}$
$\frac{8}{15}-\frac{1}{15}= $$\frac{7}{15}$
$\frac{5}{12}+\frac{5}{12}= $$\frac{5}{6}$
$\frac{3}{7}+\frac{3}{7}= $$\frac{6}{7}$
$\frac{4}{11}+\frac{4}{11}= $$\frac{8}{11}$
$\frac{5}{8}+\frac{5}{8}= $$\frac{5}{4}$
$\frac{6}{13}+\frac{6}{13}= $$\frac{12}{13}$
计算
$\frac{1}{3}+\frac{1}{3}+\frac{1}{3}= $1
$\frac{2}{5}+\frac{2}{5}+\frac{2}{5}= $$\frac{6}{5}$
$\frac{3}{7}+\frac{3}{7}+\frac{3}{7}= $$\frac{9}{7}$
$\frac{3}{8}+\frac{3}{8}+\frac{3}{8}= $$\frac{9}{8}$
$\frac{3}{10}+\frac{3}{10}+\frac{3}{10}= $$\frac{9}{10}$
$\frac{7}{20}+\frac{7}{20}+\frac{7}{20}= $$\frac{21}{20}$
$\frac{5}{7}+\frac{5}{7}+\frac{5}{7}+\frac{5}{7}= $$\frac{20}{7}$
$\frac{2}{9}+\frac{2}{9}+\frac{2}{9}+\frac{2}{9}= $$\frac{8}{9}$
$\frac{4}{15}+\frac{4}{15}+\frac{4}{15}+\frac{4}{15}= $$\frac{16}{15}$
$\frac{7}{12}+\frac{7}{12}+\frac{7}{12}+\frac{7}{12}+\frac{7}{12}= $$\frac{35}{12}$
$\frac{9}{11}+\frac{9}{11}+\frac{9}{11}+\frac{9}{11}+\frac{9}{11}= $$\frac{45}{11}$
$\frac{4}{9}+\frac{4}{9}+\frac{4}{9}+\frac{4}{9}+\frac{4}{9}= $$\frac{20}{9}$

答案： 解析：
这些问题都是关于分数的加减运算，而且每个问题的分母都是相同的，所以只需要对分子进行加减就可以了。
答案：
1. $\frac{3}{8} + \frac{5}{8} = 1$
2. $\frac{4}{9} + \frac{1}{9} = \frac{5}{9}$
3. $\frac{2}{6} + \frac{3}{6} = \frac{5}{6}$
4. $\frac{7}{5} + \frac{2}{5} = \frac{9}{5}$
5. $\frac{3}{16} + \frac{4}{16} = \frac{7}{16}$
6. $\frac{5}{11} - \frac{2}{11} = \frac{3}{11}$
7. $\frac{8}{15} - \frac{1}{15} = \frac{7}{15}$
8. $\frac{5}{12} + \frac{5}{12} = \frac{10}{12} = \frac{5}{6}$
9. $\frac{3}{7} + \frac{3}{7} = \frac{6}{7}$
10. $\frac{4}{11} + \frac{4}{11} = \frac{8}{11}$
11. $\frac{5}{8} + \frac{5}{8} = \frac{10}{8} = \frac{5}{4}$
12. $\frac{6}{13} + \frac{6}{13} = \frac{12}{13}$
13. $\frac{1}{3} + \frac{1}{3} + \frac{1}{3} = 1$
14. $\frac{2}{5} + \frac{2}{5} + \frac{2}{5} = \frac{6}{5}$
15. $\frac{3}{7} + \frac{3}{7} + \frac{3}{7} = \frac{9}{7}$
16. $\frac{3}{8} + \frac{3}{8} + \frac{3}{8} = \frac{9}{8}$
17. $\frac{3}{10} + \frac{3}{10} + \frac{3}{10} = \frac{9}{10}$
18. $\frac{7}{20} + \frac{7}{20} + \frac{7}{20} = \frac{21}{20}$
19. $\frac{5}{7} + \frac{5}{7} + \frac{5}{7} + \frac{5}{7} = \frac{20}{7}$
20. $\frac{2}{9} + \frac{2}{9} + \frac{2}{9} + \frac{2}{9} = \frac{8}{9}$
21. $\frac{4}{15} + \frac{4}{15} + \frac{4}{15} + \frac{4}{15} = \frac{16}{15}$
22. $\frac{7}{12} + \frac{7}{12} + \frac{7}{12} + \frac{7}{12} + \frac{7}{12} = \frac{35}{12}$
23. $\frac{9}{11} + \frac{9}{11} + \frac{9}{11} + \frac{9}{11} + \frac{9}{11} = \frac{45}{11}$
24. $\frac{4}{9} + \frac{4}{9} + \frac{4}{9} + \frac{4}{9} + \frac{4}{9} = \frac{20}{9}$