2021年新人教版七年级数学下册第六章实数测试题及答案.pdf

第六章实数（2）一、选择题（每小题3 分，共 30 分）1.下列各式中无意义的是（）A.61B.21-）（C.12aD.222xx2.在下列说法中：10 的平方根是 10；-2 是 4 的一个平方根；94的平方根是32的算术平方根是；24aa，其中正确的有（）个个个个2.下列说法中正确的是（）A.立方根是它本身的数只有1 和 0 B.算数平方根是它本身的数只有1 和 0C.平方根是它本身的数只有1 和 0 D.绝对值是它本身的数只有1 和 04.641的立方根是（）A.21B.41C.41D.215.现有四个无理数5，6，7，8，其中在实数2+1 与3+1 之间的有（）个个个个6.实数7-，-2，-3 的大小关系是（）A.237B.273C.372D.7237.已知351.1=，31.15=，3151.0=5，则31510的值是（）若33)2(,2,3cba，则cba,的大小关系是（）A.cbaB.bacC.cabD.abc9.已知x是 169 的平方根，且232xyx，则y的值是（）B.11 C.15 或314310.大于52且小于23的整数有（）个个C.7 个个二、填空题（每小题3 分，共 30 分）11.3-绝对值是，3-的相反数是.12.81的平方根是，364的平方根是，-343 的立方根是，精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页，共 4 页256的平方根是.13.比较大小：（1）10；（2）332；（3）101101；（4）22.14.当时，3345223xxx有意义。15.已知212ba=0，则ab=.16.最大的负整数是，最小的正整数是，绝对值最小的实数是，不超过380的最大整数是.17.已知,3,312ba且0ab，则ba的值为。18.已知一个正数x的两个平方根是1a和3a，则a=，x=.19.设a是大于 1 的实数，若312,32,aaa在数轴上对应的点分别记作A、B、C，则 A、B、C三点在数轴上从左至右的顺序是.20.若无理数m满足 14m，请写出两个符合条件的无理数.三、解答题（共40 分）21.（8 分）计算：（1）（25.08；（2）4002254；（3）32333111）（）（；（4）33332734312512581；22.（12 分）求下列各式中的x的值：（1）9-242x；（2）25122x；（3）375433x；（4）08123x；23.（6 分）已知实数a、b、c在数轴上的对应点如图所示，化简：cbacbaa0cba精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页，共 4 页文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J724.（7 分）若a、b、c是有理数，且满足等式332232cba，试计算20112010bca的值。25.（7 分）观察：52252458522，即52252-21033103910271033，即10331033猜想2655等于什么，并通过计算验证你的猜想.精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页，共 4 页文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7参考答案；11.3，3；12.3，2，-7，4；13.，；x23；，1，0，-5；17.310；，4；CA；20.3，2；，-3，-1，-3；22.21或27，3 或者 2，-1，-21；a；262552655精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 4 页，共 4 页文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 ZN5S3D4X6J7文档编码:CW7C3A9L1Z3 HM7L9L9R3V4 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