一、求比值。
$24:72=$ $8.5:1.7=$ $10:0.8=$
$\frac {1}{4}:\frac {1}{3}=$ $14:35=$ $\frac {5}{8}:\frac {5}{6}=$
$3.75:2.5=$ $\frac {2}{3}:\frac {1}{4}=$ $7.2:4.8=$
$3:0.6=$ $5:\frac {5}{12}=$ $2.4:0.32=$
$0.64:0.8=$ $\frac {1}{6}:\frac {2}{3}=$ $0.18:\frac {4}{5}=$
$8:\frac {8}{9}=$ $0.8:0.6=$ $2.5:0.45=$
$24:\frac {8}{27}=$ $\frac {1}{8}:\frac {1}{4}=$ $0.75:0.25=$
$\frac {5}{8}:15=$ $0.8:0.75=$ $\frac {3}{2}:\frac {3}{5}=$
$140:35=$ $\frac {2}{5}:\frac {2}{3}=$ $\frac {4}{5}:\frac {16}{15}=$
$\frac {3}{5}:\frac {3}{7}=$ $1.7:0.4=$ $1.4:\frac {1}{5}=$

一、$\frac{1}{3}$ 5 12.5 $\frac{3}{4}$ $\frac{2}{5}$ $\frac{3}{4}$ $\frac{3}{2}$ $\frac{8}{3}$ $\frac{3}{2}$ 5 12 7.5 0.8 $\frac{1}{4}$ $\frac{9}{40}$ 9 $\frac{4}{3}$ $\frac{50}{9}$ 81 $\frac{1}{2}$ 3 $\frac{1}{24}$ $\frac{16}{15}$ $\frac{5}{2}$ 4 $\frac{3}{5}$ $\frac{3}{4}$ $\frac{7}{5}$ $\frac{17}{4}$ 7

$24:72=24÷72=\frac{1}{3}$
$8.5:1.7=8.5÷1.7=5$
$10:0.8=10÷0.8=12.5$
$\frac{1}{4}:\frac{1}{3}=\frac{1}{4}÷\frac{1}{3}=\frac{3}{4}$
$14:35=14÷35=\frac{2}{5}$
$\frac{5}{8}:\frac{5}{6}=\frac{5}{8}÷\frac{5}{6}=\frac{3}{4}$
$3.75:2.5=3.75÷2.5=\frac{3}{2}$
$\frac{2}{3}:\frac{1}{4}=\frac{2}{3}÷\frac{1}{4}=\frac{8}{3}$
$7.2:4.8=7.2÷4.8=\frac{3}{2}$
$3:0.6=3÷0.6=5$
$5:\frac{5}{12}=5÷\frac{5}{12}=12$
$2.4:0.32=2.4÷0.32=7.5$
$0.64:0.8=0.64÷0.8=0.8$
$\frac{1}{6}:\frac{2}{3}=\frac{1}{6}÷\frac{2}{3}=\frac{1}{4}$
$0.18:\frac{4}{5}=0.18÷0.8=\frac{9}{40}$
$8:\frac{8}{9}=8÷\frac{8}{9}=9$
$0.8:0.6=0.8÷0.6=\frac{4}{3}$
$2.5:0.45=2.5÷0.45=\frac{50}{9}$
$24:\frac{8}{27}=24÷\frac{8}{27}=81$
$\frac{1}{8}:\frac{1}{4}=\frac{1}{8}÷\frac{1}{4}=\frac{1}{2}$
$0.75:0.25=0.75÷0.25=3$
$\frac{5}{8}:15=\frac{5}{8}÷15=\frac{1}{24}$
$0.8:0.75=0.8÷0.75=\frac{16}{15}$
$\frac{3}{2}:\frac{3}{5}=\frac{3}{2}÷\frac{3}{5}=\frac{5}{2}$
$140:35=140÷35=4$
$\frac{2}{5}:\frac{2}{3}=\frac{2}{5}÷\frac{2}{3}=\frac{3}{5}$
$\frac{4}{5}:\frac{16}{15}=\frac{4}{5}÷\frac{16}{15}=\frac{3}{4}$
$\frac{3}{5}:\frac{3}{7}=\frac{3}{5}÷\frac{3}{7}=\frac{7}{5}$
$1.7:0.4=1.7÷0.4=\frac{17}{4}$
$1.4:\frac{1}{5}=1.4÷0.2=7$

二、连一连。