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你這題目是三分之一减二分之一還是3—2?看清楚噢.如果是3—2就是2010個1相加為2010.如果是三分之一减二分之一,結果就是二分之一减去2012分之一.通分之後可以算出來的.去掉絕對值為二分之一减三分之一加上四分之一减三分之一,可以約掉三分之一,依次類推就可以了
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