第43页

信息发布者:
18
51
72
36
$\frac{11}{12}=\frac{55}{60}$ $\frac{13}{15}=\frac{52}{60}$
$\frac{4}{7}=\frac{20}{35}$ $\frac{9}{35}=\frac{9}{35}$
$\frac{3}{25}=\frac{24}{200}$ $\frac{13}{40}=\frac{65}{200}$
$\frac{5}{6}=\frac{35}{42}$ $\frac{5}{7}=\frac{30}{42}$
A
C
$\frac{11}{12}=\frac{66}{72}$ $\frac{3}{8}=\frac{27}{72}$ $\frac{5}{9}=\frac{40}{72}$
$\frac{2}{3}=\frac{40}{60}$
$\frac{3}{4}=\frac{45}{60}$ $\frac{1}{5}=\frac{12}{60}$
$\frac{5}{a}=\frac{5b}{ab}$ $\frac{9}{b}=\frac{9a}{ab}$
45
9


2
8
1
3
3
12
4
12

$\frac{5}{6}$=$\frac{15}{18}$ $\frac{4}{9}$=$\frac{8}{18}$


×
$\frac{4}{5}$=$\frac{12}{15}$ $\frac{4}{3}$=$\frac{20}{15}$