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简单的脱式计算
9.5x3/4+1/2x75%
人气:351 ℃ 时间:2020-02-05 21:03:47
解答
9.5x3/4+1/2x75%
=9.5*0.75+0.5*0.75
=(9.5+0.5)*0.75
=10*0.75
=7.5
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