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3.35×6.47×2+6.7×3.6 简便计算
人气:375 ℃ 时间:2020-05-02 07:31:36
解答
3.35×6.47×2+6.7×3.6
=6.7×6.47+6.7×3.6
=6.7x(6.47+3.6)
=6.7x10.7
=71.69
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