$\frac{12}{13} ÷ 2 =$
$\frac{2}{7} × 14 =$
$\frac{7}{9} ÷ \frac{2}{3} =$
$\frac{8}{25} ÷ 3 =$
$\frac{7}{12} - \frac{1}{3} =$
$\frac{1}{13} ÷ \frac{2}{13} =$
$0.3 ÷ \frac{6}{7} =$
$\frac{4}{5} ÷ 0.4 =$
$\frac{3}{8} ÷ \frac{1}{3} =$
$1.5 ÷ \frac{5}{9} =$
$\frac{8}{45} ÷ \frac{4}{15} =$
$\frac{9}{5} ÷ \frac{2}{3} =$
$\frac{5}{12} ÷ \frac{25}{36} =$
$\frac{3}{35} ÷ \frac{9}{7} =$
$\frac{7}{15} ÷ \frac{7}{5} =$
$2 ÷ \frac{3}{8} =$
$\frac{8}{21} ÷ \frac{2}{7} =$
$\frac{13}{18} ÷ \frac{13}{3} =$
$\frac{5}{14} ÷ \frac{5}{12} =$
$\frac{5}{32} ÷ \frac{25}{8} =$

1. $\frac{6}{13}$ 4 $\frac{7}{6}$ $\frac{8}{75}$
$\frac{1}{4}$ $\frac{1}{2}$ 0.35 2
$\frac{9}{8}$ 2.7 $\frac{2}{3}$ $\frac{27}{10}$
$\frac{3}{5}$ $\frac{1}{15}$ $\frac{1}{3}$ $\frac{16}{3}$
$\frac{4}{3}$ $\frac{1}{6}$ $\frac{6}{7}$ $\frac{1}{20}$

2 脱式计算（能简算的要简算）
建议用时4分钟 评价：☆☆☆
$16÷(\dfrac{3}{4}-\dfrac{1}{2})$
$(\dfrac{1}{3}+\dfrac{3}{4}-\dfrac{1}{6})÷\dfrac{1}{12}$
$3\dfrac{5}{13}-5÷9-\dfrac{1}{9}×13$
$\dfrac{49}{5}×\dfrac{7}{8}÷7$
$\dfrac{7}{8}÷\dfrac{9}{14}-\dfrac{7}{8}×\dfrac{5}{9}$
$6÷\dfrac{3}{8}-\dfrac{3}{8}÷6$
$(\dfrac{1}{6}+\dfrac{1}{3})÷\dfrac{5}{18}$
$(1-\dfrac{14}{15})÷\dfrac{4}{9}×\dfrac{5}{18}$
$5÷[(\dfrac{2}{3}+\dfrac{1}{5})×15]$

2. 64 11 $1\frac{5}{13}$
$\frac{49}{40}$ $\frac{7}{8}$ $15\frac{15}{16}$
$\frac{9}{5}$ $\frac{1}{24}$ $\frac{5}{13}$

一袋食盐的包装袋上写着“净重450克±5克”，这说明这袋食盐最多有（）克，最少有（）克。

3. 455 445