电子课本网 第48页

第48页

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​$\frac {2}{3}=\frac {6}{9},$​​$\frac {5}{9}=\frac {5}{9}$​
​$\frac {2}{7}=\frac {16}{56},$​​$\frac {3}{8}=\frac {21}{56}$​
​$\frac {7}{9}=\frac {28}{36},$​​$\frac {11}{12}=\frac {33}{36}$​
​$\frac {7}{12}=\frac {14}{24},$​​$\frac {7}{8}=\frac {21}{24}$​
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​$\frac 78=\frac {63}{72},$​​$\frac 79=\frac {56}{72}$​
​$\frac {62}{72},$​​$\frac {61}{72},$​​$\frac {60}{72},$​​$\frac {59}{72},$​​$\frac {58}{72},$​​$\frac {57}{72}$​