电子课本网 第108页

第108页

信息发布者:
$2\frac {1}{4}$
$\frac {2}{3}$
$1\frac {7}{12}$
$1\frac {7}{24}$
$​=\frac {24}{40}+\frac {25}{40}​$
$​ =\frac {49}{40}​$
$​=\frac {21}{36}-\frac {16}{36}​$
$​ =\frac 5{36}​$
$​=\frac {10}{60}+\frac {21}{60}​$
$​ =\frac {31}{60}​$
$​=\frac {36}{40}-\frac {15}{40}​$
$​ =\frac {21}{40}​$
$​=\frac {16}{24}+\frac 9{24}​$
$​ =\frac {25}{24}​$
$​=\frac {21}{45}-\frac {10}{45}​$
$​ =\frac {11}{45}​$
$​=\frac {10}{24}+\frac {15}{24}​$
$​ =\frac {25}{24}​$
$​=\frac {14}{12}-\frac 9{12}​$
$​ =\frac 5{12}​$
$​=\frac 8{12}+\frac 9{12}+\frac 2{12}​$
$​ =\frac {19}{12}​$
$​=\frac {14}{15}-\frac 5{15}-\frac 9{15}​$
$​ =0​$
$​=\frac 7{12}+\frac 5{12}-\frac 25​$
$​ =1-\frac 25​$
$​ =\frac 35​$
$​=\frac 78-\frac 38-\frac 25​$
$​ =\frac 12-\frac 25​$
$​ =\frac 1{10}​$
$​=\frac 29-\frac 29+(\frac 56+\frac 56)​$
$​ =\frac 53​$
$​=1-(\frac 17+\frac 57)​$
$​ =1-\frac 67​$
$​ =\frac 17​$
$​1-\frac 14-\frac 16=\frac 7{12}​$
$答:涂色部分的面积占长方形面积的​ \frac 7{12}。​$