6-(2/3-1/2)脱式计算

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6-(2/3-1/2)脱式计算6-(2/3-1/2)脱式计算6-(2/3-1/2)脱式计算6-(4/6-3/6)6-7/636/6-7/630/65/15

6-(2/3-1/2)脱式计算
6-(2/3-1/2)脱式计算

6-(2/3-1/2)脱式计算
6-(4/6-3/6)
6-7/6
36/6-7/6
30/6
5/1
5