云南省2018年中考数学总复习第一章数与式第一节实数及其运算好题随堂演练.doc

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1第一章 数与式好题随堂演练1(2018曲靖)如果水位升高 2 m 时,水位的变化记为2 m,那么水位下降3 m 时,水位的变化情况是_ _2(2018宁波)36 的算术平方根是_3(2018广东省卷)已知 |b1|0,则 a1_ a b4(2018甘肃省卷)2 018 的相反数是( )A2 018 B2 018C. D12 018 12 0185(2018南通) 的值是( )4A4 B2 C6 D26|2|的倒数是( )A2 B. C D212 127(2018黔南州)下列四个数中,最大的数是( )A2 B1 C0 D. 28实数 a,b 在数轴上的对应点位置如图所示,把a,b,0 按照从小到大的顺序排列,正确的是( )Aa0b B0abCb0a D0ba9(2018德州)一年之中地球与太阳之间的距离随时间而变化,1 个天文单位是地球与太阳之间的平均距离,即 1.496 亿 km,用科学记数法表示 1.496 亿是( )A1.49610 7 B14.9610 7C0.149610 8 D1.49610 810(2018曲靖)计算:(2)( 3.14) 0 ( )1 . 327132参考答案13 m 2.6 3.24B 5.B 6.C 7.A 8.C 9.D10解:原式21333.

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