一、口算。（每题1分，共27分）
$\frac{6}{11}\div\frac{3}{11}=$ $\frac{2}{3}\times30\%=$ $\frac{1}{5}+\frac{1}{3}=$
$1 - 86\%=$ $\frac{7}{12}+\frac{1}{24}=$ $\frac{14}{15}\times\frac{5}{21}=$
$0.75 + 0.75=$ $900 - 733=$ $\frac{2}{3}\div\frac{1}{2}=$
$\frac{4}{5}\times\frac{55}{56}=$ $33\div\frac{11}{30}=$ $\frac{7}{3}-\frac{9}{4}=$
$\frac{1}{18}+\frac{5}{18}=$ $28\times\frac{3}{4}=$ $4.6\div23\%=$
$2.42\times0.7=$ $\frac{9}{14}\div\frac{3}{7}=$ $10 - 0.9=$
$0.5\div1.25=$ $2.4 + 1.56=$ $4.5\times0.8=$
$\frac{5}{8}-\frac{1}{4}=$ $\frac{5}{9}\times\frac{3}{5}=$ $\frac{10}{9}\div\frac{2}{3}=$
$600\times5\%=$ $0.72\div3.6=$ $2-\frac{3}{10}=$

2 $\frac{1}{5}$ $\frac{8}{15}$
0.14 $\frac{5}{8}$ $\frac{2}{9}$
1.5 167 $\frac{4}{3}$
$\frac{11}{14}$ 90 $\frac{1}{12}$
$\frac{1}{3}$ 21 20
1.694 $\frac{3}{2}$ 9.1
0.4 3.96 3.6
$\frac{3}{8}$ $\frac{1}{3}$ $\frac{5}{3}$
30 0.2 $1\frac{7}{10}$

二、解比例。（每题3分，共36分）
$\frac{x}{800}=\frac{3}{200}$ $\frac{5}{6}:\frac{4}{9}=\frac{15}{x}$ $0.75:\frac{11}{24}=x:\frac{1}{10}$
$25:7=x:35$ $x:\frac{1}{4}=28:\frac{1}{6}$ $x:6.4=12:8$
$\frac{6}{7}:3=x:0.7$ $\frac{1}{10}:x=\frac{1}{2}:3$ $x:1.8=5:14$
$0.5:x=0.75:6$ $0.75:\frac{9}{10}=x:\frac{2}{5}$ $\frac{3}{5}:\frac{3}{10}=x:\frac{1}{2}$

$x = 12$ $x = 8$ $x = \frac{9}{55}$
$x = 125$ $x = 42$ $x = 9.6$
$x = \frac{1}{5}$ $x = \frac{3}{5}$ $x = \frac{9}{14}$
$x = 4$ $x = \frac{1}{3}$ $x = 1$