一、根据比例的基本性质，在括号里填合适的数。
$\frac{4}{9}:\frac{1}{3}=(\ ):\frac{1}{4}$
$(\ ):30=61:65$
$2.8:(\ )=0.2:1.4$
$35:4.2=6:(\ )$
$6.5:(\ )=2:8$
$3:\frac{1}{4}=\frac{4}{3}:(\ )$
$4.8:(\ )=1.2:2.5$
$(\ ):5=\frac{2}{5}:0.5$
$\frac{1}{8}:\frac{1}{5}=(\ ):1.6$
$3:5=(\ ):8.5$
$\frac{5}{6}:(\ )=0.2:8$
$\frac{2}{5}:(\ )=\frac{1}{3}:2$
$1.2:(\ )=2:6$
$2.5:3=(\ ):1.2$
$9:(\ )=\frac{1}{4}:\frac{1}{3}$

1.$\frac{1}{3}$
2.$\frac{366}{13}$
3.$19.6$
4.$0.72$
5.$26$
6.$\frac{1}{9}$
7.$10$
8.$4$
9.$1$
10.$5.1$
11.$\frac{100}{3}$
12.$\frac{12}{5}$
13.$3.6$
14.$1$
15.$12$

二、计算下面各题，能简算的要简算。
$\frac{5}{7}×\frac{3}{4}+\frac{1}{4}÷\frac{7}{5}$
$\frac{1}{8}×[\frac{1}{2}÷(\frac{3}{5}×\frac{10}{9})]$
$\frac{5}{8}÷\frac{3}{4}-\frac{5}{9}×\frac{3}{5}$
$(\frac{3}{4}+\frac{2}{23})×8+\frac{7}{23}$
$2-\frac{6}{13}÷\frac{9}{26}-\frac{2}{3}$
$1÷(\frac{1}{5}+\frac{1}{3})×\frac{4}{25}$
$2.56×[2.5÷(12.1-11.6)]$
$8.25×4.08+0.75×4.08+4.08$

1.$\frac{5}{7}$
2.$\frac{3}{32}$
3.$\frac{1}{2}$
4.$7$
5.$0$
6.$\frac{3}{10}$
7.$12.8$
8.$40.8$