计算下面各题,能用简便算法的就用简便算法。(建议用时10分钟)
$36 ÷ \frac{4}{5} ÷ 1.25$
$\frac{5}{11} ÷ 9 + \frac{1}{9} ÷ \frac{11}{6}$
$( \frac{1}{7} + \frac{3}{8} ) × 7 × 8$
$8500 × (1 + 60\%)$
$4 - \frac{3}{32} + \frac{3}{16} ÷ 6$
$\frac{10}{9} × \frac{5}{9} - \frac{1}{9} ÷ \frac{9}{5}$
$0.25 × 32 × 12.5\%$
$\frac{2}{13} + \frac{3}{4} ÷ \frac{9}{10} + \frac{1}{6}$
$320 × ( 1 - \frac{1}{2} + 30\% )$
$( \frac{4}{5} - \frac{1}{2} ÷ 4 ) ÷ 62.5\%$
$12.5\% × \frac{8}{13} + \frac{5}{13} ÷ 8$
$[ \frac{3}{4} - ( \frac{5}{8} - \frac{1}{4} ) ] ÷ \frac{3}{8}$
$35 × (1 - 66\%)$
$\frac{1}{8} × [ \frac{1}{2} ÷ ( \frac{3}{5} × \frac{10}{9} ) ]$
$64 × (1 + 25\%) × (1 - 30\%)$

1. 36
2. $\frac{1}{9}$
3. 29
4. 13600
5. $3\frac{15}{16}$
6. $\frac{5}{9}$
7. 1
8. $\frac{15}{13}$
9. 256
10. $\frac{27}{25}$
11. $\frac{1}{8}$
12. 1
13. 11.9
14. $\frac{3}{32}$
15. 56