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题型:解答题 题类:常考题 难易度:普通

湘教版八上数学3.3.1实数及其相关概念

把下列各数填入相应的集合内:

,4, ,0.15,-7.5,- ,0,2.3.

①有理数集合:{                                               …};

②无理数集合:{                                               …};

③正实数集合:{                                               …};

④负实数集合:{                                               …}.

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