2道初一计算题,会的做下.
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2道初一计算题,会的做下.
|1/11-1/11|+|1/11-1/12|+|1/13-1/12|
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+……+|1/10-1/9|
.= =
|1/11-1/11|+|1/11-1/12|+|1/13-1/12|
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+……+|1/10-1/9|
.= =
![2道初一计算题,会的做下.](/uploads/image/z/7433228-20-8.jpg?t=2%E9%81%93%E5%88%9D%E4%B8%80%E8%AE%A1%E7%AE%97%E9%A2%98%2C%E4%BC%9A%E7%9A%84%E5%81%9A%E4%B8%8B.)
|1/11-1/11|+|1/11-1/12|+|1/13-1/12|
=1/11-1/11+1/11-1/12+1/12-1/13
=1/11-1/13
=2/143
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+……+|1/10-1/9|
=1/2-1/3-1/3+1/4-1/4+1/5+……1/9-1/9+1/10
=1/2+1/10
=6/10
=3/5
=1/11-1/11+1/11-1/12+1/12-1/13
=1/11-1/13
=2/143
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+……+|1/10-1/9|
=1/2-1/3-1/3+1/4-1/4+1/5+……1/9-1/9+1/10
=1/2+1/10
=6/10
=3/5