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zai tan wu li shu
Author(s): 
Pages: 14-15
Year: Issue:  Z2
Journal: School Journal of Mathematics

Keyword:  无理数有理数循环小数无限小数数轴再谈根号相反数错误绝对值;
Abstract: <正>初一时,我们认识了负数,并使数的范围扩展到了有理数.初二,我们又开始学习无理数,把数的范围扩展到了实数.刚学习无理数时,不少同学觉得无理数不像有理数那样直观易懂,总有一种虚幻的感觉.那么怎样学习无理数呢?请同学们注意以下几个方面.
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