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5 lines
194 B
5 lines
194 B
1 month ago
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依据性质可以对自然数进行分类 / 奇数与偶数 / 素数与合数
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问题5 如何认识负数？
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负整数是与自然数数量相等意义相反的数 / 绝对值表示数量
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