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5分之1减557分之150的绝对值加557分之150减2分之1的绝对值减负2分之1的绝对值
急
人气:248 ℃ 时间:2019-08-21 20:47:45
解答
|1/5-150/557|+|150/557-1/2|-|-1/2|
=(150/557-1/5)+(1/2-150/557)-1/2
=-1/5
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