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一到二十中奇数有几个偶数有几个
更新时间: 2020-10-31 00:00:00  

1到20中奇数有10个,分别是1,3,5,7,9,11,13,15,17,19。

偶数有10个,分别是2,4,6,8,10,12,14,16,18,20。

所有整数不是奇数(单数),就是偶数(双数)。若某数是2的倍数,它就是偶数(双数),否则就是奇数(单数)

关键词: 奇数 偶数

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