$\frac{7}{18} - \frac{7}{18} =$
$\frac{3}{8} ÷ \frac{15}{16} =$
$40 ÷ \frac{5}{8} =$
$\frac{4}{15} + \frac{1}{12} =$
$\frac{8}{45} ÷ \frac{2}{3} =$
$\frac{2}{3} ÷ \frac{16}{27} =$
$\frac{13}{14} ÷ 65 =$
$\frac{4}{15} ÷ \frac{8}{9} =$
$\frac{2}{15} ÷ \frac{4}{25} =$
$\frac{2}{21} ÷ \frac{16}{35} =$
$\frac{7}{24} ÷ \frac{7}{12} =$
$\frac{5}{7} ÷ \frac{15}{28} =$
$\frac{9}{49} ÷ \frac{27}{7} =$
$\frac{16}{25} ÷ \frac{8}{9} =$
$\frac{5}{34} ÷ \frac{20}{17} =$
$\frac{9}{16} ÷ \frac{27}{8} =$
$\frac{3}{4} × \frac{3}{5} =$
$\frac{4}{5} ÷ \frac{3}{16} =$
$\frac{5}{24} ÷ 10 =$
$\frac{5}{8} ÷ \frac{2}{3} =$

1. 0
2. $\frac{2}{5}$
3. 64
4. $\frac{7}{20}$
5. $\frac{4}{15}$
6. $\frac{9}{8}$
7. $\frac{1}{70}$
8. $\frac{3}{10}$
9. $\frac{5}{6}$
10. $\frac{5}{24}$
11. $\frac{1}{2}$
12. $\frac{4}{3}$
13. $\frac{1}{21}$
14. $\frac{18}{25}$
15. $\frac{1}{8}$
16. $\frac{1}{6}$
17. $\frac{9}{20}$
18. $\frac{64}{15}$
19. $\frac{1}{48}$
20. $\frac{15}{16}$

2 脱式计算（能简算的要简算）
建议用时6分钟 评价：☆☆☆
$\frac{7}{10} ÷ 8 ÷ \frac{14}{5}$
$\frac{7}{12} × \frac{3}{14} ÷ \frac{9}{32}$
$0.125 × \frac{1}{9} + \frac{7}{8} ÷ 9$
$35 ÷ ( \frac{6}{5} ÷ \frac{3}{7} )$
$13 × ( \frac{5}{26} - \frac{1}{14} ) × 14$
$( \frac{5}{8} - \frac{1}{4} ) ÷ ( \frac{8}{9} + \frac{1}{3} )$
$\frac{17}{42} × 43 - \frac{17}{42}$
$3.6 × \frac{7}{8} + 2.4 ÷ \frac{8}{7}$
$\frac{1}{6} × \frac{2}{3} ÷ ( \frac{4}{5} - \frac{8}{15} )$

1. $\frac{1}{32}$
2. $\frac{4}{9}$
3. $\frac{1}{9}$
4. $\frac{25}{2}$
5. 22
6. $\frac{27}{88}$
7. 17
8. $\frac{21}{4}$
9. $\frac{5}{12}$