一、口算。（每题1分，共32分）
$\frac{1}{3} ÷ 4 =$
$\frac{5}{4} ÷ \frac{4}{5} =$
$\frac{1}{2} × \frac{3}{4} =$
$\frac{17}{15} × 60 =$
$\frac{5}{3} × \frac{5}{3} =$
$\frac{7}{9} ÷ \frac{1}{3} =$
$\frac{3}{22} ÷ \frac{9}{11} =$
$\frac{4}{5} ÷ \frac{7}{8} =$
$1.8 × \frac{5}{6} =$
$\frac{5}{11} × \frac{7}{25} =$
$\frac{7}{13} × \frac{26}{21} =$
$\frac{14}{17} ÷ \frac{1}{51} =$
$\frac{4}{5} ÷ 1 =$
$\frac{4}{5} × \frac{1}{2} =$
$\frac{2}{5} × 1.5 =$
$\frac{8}{9} ÷ 24 =$
$10 ÷ \frac{2}{5} =$
$\frac{1}{9} × 81 =$
$\frac{2}{3} - \frac{4}{11} =$
$\frac{3}{10} ÷ \frac{9}{10} =$
$\frac{1}{2} × 16 =$
$4.2 × \frac{2}{21} =$
$\frac{3}{7} × \frac{2}{3} =$
$3 ÷ \frac{6}{7} =$
$18 ÷ \frac{9}{5} =$
$\frac{1}{5} ÷ \frac{1}{8} =$
$\frac{2}{3} ÷ \frac{8}{9} =$
$\frac{1}{6} ÷ \frac{1}{3} =$
$\frac{1}{4} × \frac{12}{11} =$
$\frac{7}{9} ÷ \frac{1}{36} =$
$\frac{4}{7} - \frac{5}{21} =$
$\frac{1}{12} ÷ \frac{1}{8} =$

$\frac{1}{12}$
$\frac{25}{16}$
$\frac{3}{8}$
68
$\frac{25}{9}$
$\frac{7}{3}$
$\frac{1}{6}$
$\frac{32}{35}$
1.5
$\frac{7}{55}$
$\frac{2}{3}$
42
$\frac{4}{5}$
$\frac{2}{5}$
0.6
$\frac{1}{27}$
25
9
$\frac{10}{33}$
$\frac{1}{3}$
8
0.4
$\frac{2}{7}$
$\frac{7}{2}$
10
$\frac{8}{5}$
$\frac{3}{4}$
$\frac{1}{2}$
$\frac{3}{11}$
28
$\frac{1}{3}$
$\frac{2}{3}$

二、在○里填上“＞”“＜”或“=”。(每题1分,共9分)
0○-100
$-\dfrac{1}{3}$○$-\dfrac{1}{4}$
$2-3$○$2-4$
$\dfrac{10}{11} × \dfrac{99}{100}$○$\dfrac{10}{11}$
$\dfrac{8}{13} × \dfrac{4}{5}$○$\dfrac{8}{13} × \dfrac{6}{5}$
$\dfrac{7}{12} ÷ \dfrac{4}{5}$○$\dfrac{7}{12} × \dfrac{6}{5}$
$\dfrac{10}{11} ÷ \dfrac{11}{12}$○$\dfrac{10}{11}$
$\dfrac{8}{13} ÷ \dfrac{4}{5}$○$\dfrac{8}{13} × \dfrac{5}{4}$
$1 ÷ \dfrac{4}{5}$○$1 × \dfrac{4}{5}$

＞
＜
＞
＜
＜
＞
＞
=
＞

三、在()里填上合适的数。(每空2分,共18分)
()×5=$\frac{1}{2}$
$\frac{5}{4}$×()=$\frac{1}{6}$
()÷2=$\frac{1}{5}$
6×()=$\frac{1}{3}$
$\frac{5}{9}$÷()=$\frac{3}{4}$
()÷4=$\frac{2}{3}$
()×$\frac{2}{3}$=1
()×6=$\frac{3}{5}$
()÷$\frac{5}{9}$=$\frac{3}{4}$

$\frac{1}{10}$
$\frac{2}{15}$
$\frac{2}{5}$
$\frac{1}{18}$
$\frac{20}{27}$
$\frac{8}{3}$
$\frac{3}{2}$
$\frac{1}{10}$
$\frac{5}{12}$