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2018_2019学年高中数学第一章集合1.2.2集合的运算情境导学素材新人教B版必修1.doc

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11.2.2 集合的运算【情境导学】 高一某班有 50 位同学,为庆祝元旦组织文艺汇演,在众多节目中,演唱歌曲的有 31 人,表演相声的有 40 人,这两种节目均不参加的有 4 人,试问两种节目均参加的有多少人?提示:两种节目均参加的人数为(31+40)-(50-4)=25.即均参加的有 25 人.

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