计算下面各题，能用简便算法的就用简便算法。
$48×(\frac{5}{6}+\frac{1}{4}-\frac{7}{8})$
$3.6÷\frac{3}{7}×\frac{1}{4}$
$\frac{5}{8}×[\frac{3}{5}-(\frac{7}{15}-\frac{2}{5})]$
$\frac{4}{7}×4+\frac{2}{7}×20$
$\frac{5}{7}×\frac{3}{4}+\frac{1}{4}÷\frac{7}{5}$
$(1-\frac{1}{4}×\frac{8}{9})÷\frac{7}{9}$
$\frac{5}{8}÷\frac{3}{4}-\frac{5}{9}×\frac{3}{5}$
$25+5÷(\frac{13}{15}-\frac{2}{3})$
$\frac{7}{12}÷[(\frac{7}{16}+\frac{1}{4})×\frac{8}{33}]$
$\frac{3}{8}÷(\frac{3}{5}+\frac{3}{20})$
$\frac{7}{20}÷\frac{1}{4}×(\frac{2}{5}+\frac{4}{5})$
$\frac{8}{9}×[\frac{3}{4}+(\frac{13}{16}-\frac{3}{4})]$
$(\frac{2}{9}+\frac{2}{19})×4+\frac{11}{19}$
$\frac{8}{9}×(\frac{1}{4}+\frac{2}{5})÷\frac{13}{20}$
$\frac{5}{7}×16.31-2.31÷\frac{7}{5}$
$\frac{2}{9}+50\%÷\frac{4}{5}+\frac{3}{8}$
$\frac{1}{8}×[2÷(\frac{3}{5}×\frac{10}{9})]$
$13\%×21.8+28.2×0.13$
$5.64÷5+4.36×20\%$
$1÷(\frac{1}{5}+\frac{1}{3})×16\%$
$\frac{4}{5}÷(\frac{5}{8}-50\%)÷62.5\%$
$(\frac{4}{5}+\frac{1}{4})÷\frac{7}{4}+70\%$
$(10-10\%×70)÷\frac{3}{7}$
$(1-37.5\%-25\%)÷25\%$
$2-\frac{6}{13}÷\frac{9}{26}-\frac{2}{3}$
$\frac{4}{5}×3.5+5.5×80\%$
$(1+25\%)÷(1-25\%)$
$\frac{4}{11}×\frac{8}{9}+\frac{7}{11}×\frac{8}{9}$
$25\%×39+75\%×39$
$\frac{3}{4}×40\%+0.75×\frac{3}{5}$

1.$10$
2.$2.1$
3.$\frac{1}{3}$
4.$8$
5.$\frac{5}{7}$
6.$1$
7.$\frac{1}{2}$
8.$50$
9.$\frac{7}{2}$
10.$\frac{1}{2}$
11.$\frac{42}{25}$
12.$\frac{13}{18}$
13.$1\frac{8}{9}$
14.$\frac{8}{9}$
15.$10$
16.$1\frac{2}{9}$
17.$\frac{3}{8}$
18.$6.5$
19.$2$
20.$\frac{3}{10}$
21.$\frac{256}{25}$
22.$\frac{13}{10}$
23.$7$
24.$1.5$
25.$0$
26.$\frac{36}{5}$
27.$\frac{5}{3}$
28.$\frac{8}{9}$
29.$39$
30.$\frac{3}{4}$