$\frac{3}{10} + \frac{7}{10} =$
$\frac{5}{6} - \frac{1}{6} =$
$0 + \frac{9}{11} =$
$1 - \frac{3}{8} =$
$\frac{19}{20} - \frac{7}{20} =$
$\frac{24}{25} + \frac{18}{25} =$
$\frac{3}{4} - \frac{1}{2} =$
$\frac{13}{18} - \frac{7}{18} =$
$\frac{1}{3} + \frac{1}{6} =$
$\frac{1}{2} - \frac{1}{5} =$
$\frac{3}{4} + 0.5 =$
$\frac{4}{5} + \frac{8}{15} =$
$\frac{1}{4} - \frac{1}{5} =$
$2.4 - \frac{3}{5} =$
$1\frac{1}{8} - 1.125 =$
$\frac{1}{7} + \frac{1}{11} =$
$\frac{1}{8} + \frac{5}{8} =$
$\frac{5}{3} - 1 =$
$1 - \frac{11}{23} =$
$\frac{13}{36} - \frac{1}{4} =$

1. 1
2. $\frac{2}{3}$
3. $\frac{9}{11}$
4. $\frac{5}{8}$
5. $\frac{3}{5}$
6. $\frac{42}{25}$
7. $\frac{1}{4}$
8. $\frac{1}{3}$
9. $\frac{1}{2}$
10. $\frac{3}{10}$
11. 1.25
12. $\frac{4}{3}$
13. $\frac{1}{20}$
14. 1.8
15. 0
16. $\frac{18}{77}$
17. $\frac{3}{4}$
18. $\frac{2}{3}$
19. $\frac{12}{23}$
20. $\frac{1}{9}$

2 脱式计算（能简算的要简算） 建议用时6分钟 评价：☆☆☆
$\frac{7}{12} + \frac{2}{5} + \frac{5}{12}$
$\frac{11}{15} - \frac{1}{5} + \frac{1}{3}$
$\frac{17}{18} - \frac{2}{5} + \frac{1}{18} - \frac{1}{5}$
$\frac{9}{14} - (\frac{3}{14} + \frac{1}{5})$
$\frac{2}{9} + (\frac{3}{4} - \frac{1}{2})$
$\frac{2}{9} + \frac{3}{5} + \frac{7}{9} + \frac{1}{5}$
$10\frac{3}{14} - (2\frac{3}{14} + 3\frac{9}{10})$
$0.75 + \frac{9}{22} + 1\frac{1}{4} + \frac{13}{22}$
$4 + [ \frac{15}{7} - (\frac{1}{14} + \frac{5}{14}) ]$

1. $1\frac{2}{5}$
2. $\frac{13}{15}$
3. $\frac{2}{5}$
4. $\frac{8}{35}$
5. $\frac{17}{36}$
6. $1\frac{4}{5}$
7. $4\frac{1}{10}$
8. 3
9. $\frac{40}{7}$