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34.5*8.23-34.5+27.7*3.45简便算法
人气:359 ℃ 时间:2020-04-06 09:56:20
解答
34.5*8.23-34.5+27.7*3.45
=34.5*8.23-34.5+2.77*34.5
=34.5*(8.23-1+2.77)
=34.5*10
=345
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