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这些题怎么做,计算题,!!
1个回答
展开全部
1、7/12+1/6-5/12 =7/12-5/12+1/6 =2/12+1/6 =1/6+1/6 =2/6 =1/3 19/25-1+31/25 =19/25+31/25-1 =50/25-1 =2-1 =1 17/18-(2/3-1/6) =17/18-(4/6-1/6) =17/18-3/6 =17/18-9/18 =8/18 =4/9
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