山东省德州市武城县四女寺镇中考数学同步复习练习数与式第1课时实数(无答案).doc

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1取算术平方根 输出 y是有理数是无理数输入 x第 1 课时 实数复习班级 姓名 一、必做题:1、在实数中 32,0, ,3.14, 4中无理数有( )A1 个 B2 个 C3 个 D4 个2、下 列各式正确的是( )A B 6 C (3)D 0(2)3、有一个数值转换器如图 ,原来如下:当输 入的 x 为 64 时 ,输出 的 y 是 ( ) A8 B 2 C 3 D 24、 如图,数 轴上点 P表示的数可能是( )A. 7 B. 7 C. 3.2 D. 105、若 23()0mn,则 mn的值为( )A 4 B 1 C0 D46、至 2011 年末,南通市户籍 人口为 8.76万人,将 8.76476 万用科学记数法表示为( )A、 48.7 B、 51. C、 10 D、 7108.7、比较大小 50(用“”或“”号填空)8、计算: 201()3)2sin39、计 算: 100845cos2183321O3P

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