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3.24×0.16+0.0324×84如何巧?
人气:421 ℃ 时间:2020-02-20 18:17:56
解答
3.24×0.16+0.0324×84
=3.24×0.16+3.24×0.84
=3.24×(0.16+0.84)
=3.24
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