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5/9*0.36*1/2的简便计算方法
人气:305 ℃ 时间:2020-04-08 13:19:07
解答
5/9*0.36*1/2
=5/9*0.9*0.4*1/2
=(5*0.1)*0.2
=0.5*0.2
=0.1
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