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"9.999乘222.2+3.333乘333.4"怎么简便计算
人气:318 ℃ 时间:2020-03-27 01:00:52
解答
9.999×222.2+3.333×333.4
=3.333×3×222.2+3.333×333.4
=3.333×666.6+3.333×333.4
=3.333×(666.6+333.4)
=3.333×1000
=3333
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