山东省德州市2019中考数学复习第一章数与式第一节实数及其运算要题随堂演练2019011721.doc

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1、1实数及其运算要题随堂演练1(2018烟台中 考) 的倒数是( ) 13A3 B3 C. D13 132(2018济南中考)4 的算术平方根是( )A2 B2 C2 D. 23(2018淄博中考)与 最接近的整数是( )37A5 B6 C7 D84(2018安徽中考) 8 的绝对值是( )A8 B8 C8 D185(2018金华中考)在 0,1, ,1 这四个数中,最小的数是( )12A0 B1 C D1126(2018菏泽中考)习近平主席在 2018年新年 贺词中指出,“安 得广厦千万间,大庇天下寒士俱欢颜!”2017年,340 万贫困人口实现异地扶贫搬迁,有了温暖的新家 ,各类棚户区改造开

2、工提前 完成 600万套目标任务将 340万用科学记数法表示为( )A0.3410 7 B 34105C3.410 5 D3.410 67(2018潍坊中考)生物学家发现了某种花粉的直径约为 0.000 003 6毫米,数据 0.000 003 6用科学记数法表示正确的是( )A3.610 5 B0.3610 5C3.610 6 D0.3610 68(2018青岛中考)计算:2 1 2 cos 30_129(2018通辽中考)2018 年 5月 13日,我国第一艘国产航母出海试航,这标志着我国从此进入“双航母”时代,据估测该航母的满载排水量与辽宁舰相当,约 67 500吨,将 67 500 用科学记数法表示为 _10(2018菏泽中考)计算:1 2 018( )2 | 2|2 sin 60.12 3211(2018遂宁中考)计算:( )1 ( 1) 02 sin 45| 2|.13 8 2参考答案1B 2.A 3.B 4.B 5.D 6.D 7 .C82 9.6.7510 4310解:原式14(2 )2 32 1.332 3 311解:原式312 222 24 2 6.2 2

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