$0.05×20=$ $\frac{2}{5} \div \frac{4}{13}=$ $84×\frac{5}{7}=$
$0.6 \div 0.15=$ $\frac{9}{7}×\frac{2}{3}=$ $\frac{10}{21} \div \frac{2}{3}=$
$368 + 22=$ $\frac{7}{8} \div \frac{1}{12}=$ $\frac{3}{5} - \frac{3}{10}=$
$\frac{8}{15} \div 4=$ $1.06×5=$ $1 - 0.72\%=$
$20×6.2=$ $20\% + 34.5\%=$ $\frac{3}{7} \div \frac{7}{8}=$
$\frac{7}{8} \div \frac{5}{16}=$ $\frac{2}{5} - \frac{1}{8}=$ $\frac{2}{3} + \frac{2}{3}=$
$32×75\%=$ $\frac{5}{8} \div \frac{5}{2}=$ $\frac{2}{13}×\frac{39}{40}=$
$\frac{5}{8} - \frac{1}{15}=$ $0.75 + 0.375=$ $\frac{5}{8} \div \frac{4}{5}=$
$\frac{7}{12}×\frac{9}{14}=$ $20.8\% - 8\%=$ $18 + \frac{1}{5}=$
$0.8 \div 0.2=$ $\frac{15}{14}×\frac{21}{5}=$ $5.8 + 5.2=$

一、1 $\frac{13}{10}$ 60
4 $\frac{6}{7}$ $\frac{5}{7}$
390 $\frac{21}{2}$ $\frac{3}{10}$
$\frac{2}{15}$ 5.3 0.9928
124 54.5% $\frac{24}{49}$
$\frac{14}{5}$ $\frac{11}{40}$ $\frac{4}{3}$
24 $\frac{1}{4}$ $\frac{3}{20}$
$\frac{67}{120}$ 1.125 $\frac{25}{32}$
$\frac{3}{8}$ 12.8% $18\frac{1}{5}$
4 $\frac{9}{2}$ 11

$3:8 = x:16$ $\frac{x}{7} = \frac{0.9}{21}$ $\frac{1}{20}:\frac{1}{5} = x:\frac{1}{4}$

二、$x = 6$ $x = 0.3$ $x = \frac{1}{16}$