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1/2÷【0.75×(3/12+25%)】 简算
人气：453 ℃　时间：2020-04-07 23:30:40
解答
1/2÷[0.75x(3/12+3/12)]
=1/2÷(0.75x1/2)
=1/2÷(3/4x1/2)
=1/2x8/3
=4/3
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