1. 口算。（建议用时4分钟）
$\frac{8}{9} ÷ 2 =$
$5 ÷ \frac{5}{14} =$
$\frac{1}{4} ÷ \frac{1}{13} =$
$\frac{1}{4} ÷ \frac{5}{4} =$
$1.6 ÷ \frac{8}{35} =$
$\frac{7}{8} ÷ \frac{7}{5} =$
$\frac{1}{7} ÷ \frac{1}{3} =$
$12 ÷ \frac{2}{3} =$
$\frac{7}{6} ÷ \frac{1}{3} =$
$14 ÷ \frac{7}{8} =$
$\frac{9}{7} ÷ \frac{3}{2} =$
$\frac{8}{11} ÷ 16 =$
$0 ÷ \frac{3}{2} =$
$1 ÷ \frac{4}{7} =$
$\frac{7}{9} ÷ 7 =$
$\frac{1}{3} ÷ \frac{5}{21} =$
$\frac{4}{5} ÷ 16 =$
$6 ÷ \frac{3}{7} =$
$\frac{3}{5} ÷ 0.25 =$
$\frac{3}{8} ÷ \frac{3}{8} =$
$80 ÷ \frac{2}{3} =$
$88 ÷ \frac{44}{3} =$
$\frac{1}{45} ÷ \frac{11}{15} =$
$48 ÷ \frac{4}{3} =$

1. $\frac{4}{9}$ 14 $\frac{13}{4}$ $\frac{1}{5}$
7 $\frac{5}{8}$ $\frac{3}{7}$ 18
$\frac{7}{2}$ 16 $\frac{6}{7}$ $\frac{1}{22}$
0 $\frac{7}{4}$ $\frac{1}{9}$ $\frac{7}{5}$
$\frac{1}{20}$ 14 $\frac{12}{5}$ 1
120 6 $\frac{1}{33}$ 36

2. 在()里填上合适的数。(建议用时2分钟)
$4×( )=\dfrac{3}{5}$
$\dfrac{1}{6}×( )=10$
$\dfrac{27}{46}÷( )=\dfrac{3}{23}$
$\dfrac{5}{4}×( )=\dfrac{10}{3}$
$\dfrac{4}{5}÷( )=\dfrac{2}{5}$
$\dfrac{5}{18}×( )=\dfrac{5}{24}$

2. $\frac{3}{20}$ 60 $\frac{9}{2}$
$\frac{8}{3}$ 2 $\frac{3}{4}$

3. 计算下面各题，能用简便算法的就用简便算法。（建议用时2分钟）
$25÷ \dfrac{5}{8}× \dfrac{11}{20}$
$\dfrac{8}{9}÷ \dfrac{7}{2}+\dfrac{5}{7}× \dfrac{8}{9}$
$1-\dfrac{2}{11}÷ \dfrac{8}{11}-\dfrac{3}{4}$

3. 22 $\frac{8}{9}$ 0

4. 解决问题。(建议用时2分钟)
琪琪做“用气球驱动小车”实验，从预留路线的起点出发，小车第一次向前行驶了86 cm，第二次向前行驶了64 cm，预留的路线全长多少厘米？

4. $(86+64)÷(1-\dfrac{2}{7})=210$（cm）