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0.02+6.5*1.5/2.5用简便方法怎么做
人气:447 ℃ 时间:2020-03-28 03:46:35
解答
0.02+6.5*1.5/2.5
=0.02+1.3*5*3*0.5/5*0.5
=0.02+1.3*3
=0.02+3.9
=3.92
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