2019年春七年级数学下册第6章实数本章中考演练课时作业(新版)沪科版.docx

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1、1第 6 章 实 数本章中考演练1.(济宁中考) 的值是 (B)3 -1A.1 B.-1C.3 D.-32.(攀枝花中考)下列实数中,无理数是 (C)A.0 B.-2C. D.3173.(南充中考)下列实数中,最小的数是 (A)A.- B.02C.1 D.384.(成都中考)实数 a,b,c,d 在数轴上对应的点的位置如图所示,这四个数中最大的是 (D)A.a B.bC.c D.d5.(淄博中考)与 最接近的整数是 (B)37A.5 B.6C.7 D.86.(株洲中考)9 的算术平方根是 (A)A.3 B.9C.3 D.97.(潍坊中考)计算 |1- |= (B)2A.1- B. -12 2C

2、1+ D.-1-2 28.(长沙中考)估计 +1 的值 (C)10A.在 2 和 3 之间 B.在 3 和 4 之间C.在 4 和 5 之间 D.在 5 和 6 之间9.(邵阳中考)用计算器依次按键 3=,得到的结果最接近的是 (C) A.1.5 B.1.6C.1.7 D.1.810.(福建中考) m= ,则以下对 m 的估算正确的是 (B)4+ 3A.2m3 B.3m4C.4m5 D.5m611.(常德中考) -8 的立方根是 -2 . 12.(广东中考)一个正数的平方根分别是 x+1 和 x-5,则 x= 2 . 13.(陕西中考)在实数 -5,- ,0, 中,最大的数是 . 3 614.(泸州中考)计算: 0+ -|-4|.16+(12)-1解:原式 =1+4+2-4=3.215.(十堰中考)计算: |-2|+ -(-1)2017.3 -8解:原式 =2-2+1=1.

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