1. 直接写出得数。
$1 - 36\% =$
$1 ÷ 25\% =$
$20 × 75\% =$
$48\% - 26\% =$
$\frac{4}{5} ÷ 20\% =$
$\frac{3}{8} ÷ \frac{3}{2} =$
$0.125 ÷ \frac{3}{8} =$
$200\% ÷ 100\% =$
$5.3 ÷ 1\% =$
$\frac{4}{3} × 75\% =$
$2.4 ÷ 40\% =$
$\frac{3}{5} × 62.5\% =$
$3.25 + 65\% =$
$\frac{2}{3} × 3\% =$
$4.8 ÷ 80\% =$
$10\% × 19\% =$
$\frac{2}{7} × \frac{7}{8} =$
$\frac{1}{9} × 7.2 =$
$\frac{4}{5} × 4 =$
$\frac{4}{5} ÷ 4 =$
$1 ÷ \frac{1}{4} =$
$\frac{1}{4} ÷ 1 =$
$9 ÷ \frac{1}{3} =$
$1 ÷ \frac{3}{2} × \frac{2}{3} =$

1. 0.64
1. 4
1. 15
1. 0.22
1. 4
1. $\frac{1}{4}$
1. $\frac{1}{3}$
1. 2
1. 530
1. 1
1. 6
1. $\frac{3}{8}$
1. 3.9
1. 0.02
1. 6
1. 0.019
1. $\frac{1}{4}$
1. 0.8
1. $\frac{16}{5}$
1. $\frac{1}{5}$
1. 4
1. $\frac{1}{4}$
1. 27
1. $\frac{4}{9}$

2. 填空。
$8÷(\quad)=\frac{1}{5}=(\quad)(填小数)=(\quad)\%$
$0.6=15÷(\quad)=\frac{(\quad)}{15}=(\quad)\%=(\quad)折$
$(\quad)÷8=\frac{21}{(\quad)}=87.5\%=(\quad)(填小数)$

2. 40 0.2 20
2. 25 9 60 六
2. 7 24 0.875

3. 计算下面各题，能简算的要简算。
$(2.8 - 0.8) ÷ 80\%$
$3.2 × \frac{2}{5} + 6.8 × 40\%$
$\frac{5}{6} × ( \frac{7}{10} + \frac{4}{5} ) ÷ \frac{2}{3}$
$\frac{3}{5} × \frac{4}{3} ÷ \frac{9}{10} × 75\%$
$(72 × \frac{5}{6} + 20) ÷ 25\%$
$7.75 × \frac{3}{8} + 25\% × 0.375$

3. 2.5
3. 4
3. $\frac{15}{8}$
3. $\frac{2}{3}$
3. 320
3. 3