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第44页

信息发布者：

2

8

1

3

3

12

4

12

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}$

△

$\frac {5}{6}=\frac {15}{18}$

$\frac {4}{9}=\frac {8}{18}$

√

×

$\frac {4}{5}=\frac {12}{15}$

$\frac {4}{3}=\frac {20}{15}$

A

B

A

D

$\frac {11}{12}=\frac {66}{72}$

$ \frac {3}{8}=\frac {27}{72}$

$ \frac {5}{9}=\frac {40}{72}$

$\frac {2}{3}=\frac {40}{60} $

$\frac {3}{4}=\frac {45}{60} $

$\frac {1}{5}=\frac {12}{60}$

$\frac {4}{a}=\frac {4b}{ab}$

$ \frac {3}{b}=\frac {3a}{ab}$

45

9

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