(枣庄专版)2019届中考数学总复习第1部分第一章数与式第一节实数及其运算要题随堂演练.doc

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1、1第一节 实数及其运算要题随堂演练1(2018烟台中考) 的倒数是( )13A3 B3C. D13 132(2018济南中考)4 的算术平方根是( )A2 B2C2 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,各类棚户区改造开工提

2、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 B3410 5C3.410 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 2cos 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|2sin 60.12 3211(2018遂宁中考)计算:( )1 ( 1) 02sin 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 4 310解:原式14(2 )2 32 1.332 3 311解:原式312 222 24 2 2 26.

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