电子课本网 第109页

第109页

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​$ =\frac {6×3}{5×5}$​
​$ =\frac {18}{25}$​
​$ =\frac {2×5}3$​
​$ =\frac {10}3$​
​$ =\frac 54×\frac 85$​
​$ =2$​
​$ =9×\frac {13}6×\frac 4{39}$​
​$ =9×(\frac {13}6×\frac 4{39})$​
​$ =9×\frac 29$​
​$ =2$​
​$ =\frac 35×\frac 16×\frac {10}9$​
​$ =\frac 1{10}×\frac {10}9$​
​$ =\frac 19$​
​$ =\frac 78×\frac {25}{21}×\frac {16}5$​
​$ =\frac {25}{24}×\frac {16}5$​
​$ =\frac {10}3$​
​$ =(\frac 45+\frac {11}5)×\frac 7{12}$​
​$ =3×\frac 7{12}$​
​$ =\frac 74$​
​$ =(21+\frac 7{12})×\frac 37$​
​$ =21×\frac 37+\frac 7{12}×\frac 37$​
​$ =9+\frac 14$​
​$ =9\frac 14$​
​$ =\frac {32}{33}×(33+1)$​
​$ =\frac {32}{33}×33+\frac {32}{33}$​
​$ =32+\frac {32}{33}$​
​$ =32\frac {32}{33}$​
​$ =[1-\frac 7{20}]×\frac {25}{26}$​
​$ =\frac {13}{20}×\frac {25}{26}$​
​$ =\frac 58$​