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一、解比例。
$5:8 = x:96$ $2.5:x = 6.4:16$ $5:x = \frac{1}{6}:\frac{2}{5}$
$9:5 = 4.5:x$ $\frac{21}{x} = \frac{0.3}{0.1}$ $\frac{1}{10}:x = \frac{1}{8}:\frac{1}{6}$
$\frac{1}{15}:\frac{1}{5} = x:3$ $x:80 = 5:4$ $\frac{5}{0.3} = \frac{25}{x}$
$6.5:x = 3.25:4$ $\frac{0.4}{x} = \frac{1.3}{26}$ $\frac{3}{5}:x = \frac{3}{7}:\frac{1}{10}$
$\frac{x}{20} = \frac{4.2}{4}$ $1.5:5 = x:1.8$ $\frac{5}{7}:(x + \frac{1}{3}) = \frac{9}{16}:\frac{7}{20}$
$5:8 = x:96$ $2.5:x = 6.4:16$ $5:x = \frac{1}{6}:\frac{2}{5}$
$9:5 = 4.5:x$ $\frac{21}{x} = \frac{0.3}{0.1}$ $\frac{1}{10}:x = \frac{1}{8}:\frac{1}{6}$
$\frac{1}{15}:\frac{1}{5} = x:3$ $x:80 = 5:4$ $\frac{5}{0.3} = \frac{25}{x}$
$6.5:x = 3.25:4$ $\frac{0.4}{x} = \frac{1.3}{26}$ $\frac{3}{5}:x = \frac{3}{7}:\frac{1}{10}$
$\frac{x}{20} = \frac{4.2}{4}$ $1.5:5 = x:1.8$ $\frac{5}{7}:(x + \frac{1}{3}) = \frac{9}{16}:\frac{7}{20}$
答案
$x=60$ $x=6.25$ $x=12$
$x=2.5$ $x=7$ $x=\frac{2}{15}$
$x=1$ $x=100$ $x=1.5$
$x=8$ $x=8$ $x=\frac{7}{50}$
$x=21$ $x=0.54$ $x=\frac{1}{9}$
$x=2.5$ $x=7$ $x=\frac{2}{15}$
$x=1$ $x=100$ $x=1.5$
$x=8$ $x=8$ $x=\frac{7}{50}$
$x=21$ $x=0.54$ $x=\frac{1}{9}$
