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0.75*2.7+72*0.075+0.075的简便计算
人气:323 ℃ 时间:2020-04-03 15:22:41
解答
0.75*2.7+72*0.075+0.075
=0.75*2.7+7.2*0.75+0.1*0.75
=0.75*(2.7+7.2+0.1)
=0.75*10
=7.5
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