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第82頁(yè)

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C
B
$\frac{1}{6}$
$1\frac{11}{25}$
10
$\frac{3}{5}$
$\frac{1}{8}$
$1\frac{1}{2}$
$\frac{49}{81}$
$\frac{5}{6}$
?$ =18×\frac 23+\frac 9{13}×\frac 23$?
?$ =12+\frac 6{13}$?
?$ =12\frac 6{13}$?
?$ =\frac 45×9+\frac 15×9$?
?$ =(\frac 45+\frac 15)×9$?
?$ =9$?
?$ =(1-\frac 16)×\frac {12}5$?
?$ =\frac 56×\frac {12}5$?
?$ =2$?
?$ =(101-1)×\frac {11}{20}$?
?$ =100×\frac {11}{20}$?
?$ =55$?
?$ =\frac 37×7-\frac 1{34}×7-\frac {27}{34}$?
?$ =3-(\frac 7{34}+\frac {27}{34})$?
?$ =3-1$?
?$ =2$?
?$ =46-11×\frac 17-\frac 17×3$?
?$ =46-(11+3)×\frac 17$?
?$ =46-14×\frac 17$?
?$ =46-2$?
?$ =44$?
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