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1、精编学习资料欢迎下载试卷三、北师大版八年级上册数学期中测试卷（本试卷满分 120 分，考试时间 120分钟）题号一二三四五六总分得分一、选择题（每小题3 分，共 36分）1、36 的平方根是（）A、6 B、36 C、6D、6 2、下列语句：1 是 1 的平方根。带根号的数都是无理数。1 的立方根是 1。38 的立方根是 2。(2)2的算术平方根是 2。125 的立方根是 5。有理数和数轴上的点一一对应。其中正确的有（）A、2 个B、3 个C、4 个D、5 个3、下列计算正确的是（）A、327=3 B、a2+a3=a5 C、a2 a3=a6 D、(2x)3=6x3 4、分解因式 2xy2+6x3
2、y210 xy 时，合理地提取的公因式应为（）A、2xy2 B、2xy C、2xy D、2x2y 5、对下列多项式分解因式正确的是（）A、a3b2a2b3+a2b2=a2b2(ab)B、4a24a+1=4a(a 1)+1 C、a2+4b2=(a+2b)2 D、19a2=(1+3a)(13a)6、计算（3ab）(3ab)等于（）A、9a26abb2 B、b26ab9a2C、b29a2D、9a2b2 7、以下各组数据为边长，能组成直角三角形的是（）A、4、5、6 B、5、8、10 C、8、39、40 D、8、15、17 8、已知(a+b)2=(ab)2+A，则 A 为（）精编学习资料欢迎下载b a
3、 图 1 图 2 B A C 0 1 2 3 参考数据：8=2221.414 D A B CE(120,60)(250,60)(80,40)(100,100)(180,60)(200,100)A、2ab B、2ab C、4ab D、4ab 9、若直角三角形有两条边的长分别为3和 4，则第三边的长为（）A、5 B、7C、5 或7D、不能确定10、从边长为 a的大正方形纸板中挖去一个边长为b 的小正方形后，将其裁成四个相同的等腰梯形（如图1），然后拼成一个平行四边形（如图2）。那么通过计算两个图形的阴影部分的面积，可以验证成立的公式是（）A、a2b2=(ab)2B、(a+b)2=a+2ab+b C
4、、(ab)2=a22ab+b 2D、a2b2=(ab)(a+b)11、如图，在 RtABC 中，ACB=90，AC=BC，边 AC 落在数轴上，点 A 表示的数是 1，点 C 表示的数是 3。以点 A 为圆心、AB 长为半径画弧交数轴负半轴于点B1，则点 B1所表示的数是（）A、2 B、22C、122D、22 1 12、A、B、C、D、E 五个景点之间的路线如图所示。若每条路线的里程a(km)及行驶的平均速度b(km/h)用(a,b)表示，则从景点 A 到景点 C 用时最少的路线是（）A、AEC B、ABC C、AEBC D、ABEC 二、填空题（每小题3 分，共 24分）13、下列各数：2，
5、49，3，3.1415，722，5，38，0.2020，0.7，文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9
6、 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1
7、L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9
8、 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1
9、L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9
10、 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1
11、L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4精编学习资料欢迎下载B A C 其中是无理数的有 _。14、化简：214.3）（=_。15、计算：3xy2(5x3y)=_.。16、如果多项式 x24ax+4恰好是完全平方式，那么a=_。17、已知 m2+m 2=0，则代数式 m3+3m2+2000 的值为 _.。18、已知三角形的三边分别为5
12、，12，13，则这个三角形是 _三角形。19、已知：如图，每个小方格是边长为1 的正方形，则ABC的周长为 _(保留根号)20、若(a2009)2+(2011a)2=2，则(2011a)(a2009)=_。三、计算下列各题（每题5 分，共 10 分）：21、x3(2x3)2(x4)2 22、(2x5)2(2x+5)2 四、因式分解（每小题7 分，共 14 分）：23、m39m 文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 Z
13、G2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4
14、Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 Z
15、G2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4
16、Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 Z
17、G2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4
18、Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 Z
19、G2H3O3T8F4精编学习资料欢迎下载C A B 24、x2(xy)+yx 五、先化简，再求值（共7 分）：25、(a2b2ab2b3)b(ab)(a+b)，其中，a=2,b=21六、解答题（26、27 题各 9 分，28 题 11 分，共 29 分）26、中华人民共和国道路交通管理条例规定，小汽车在城街路上行驶速度不得超 70 千米/小时。如图，一辆小汽车在一条城市街道直道上行驶，某一时刻刚好行驶到面对车速检测仪A 正前方 30 米 C 处，过 32 秒后，测得小汽车与车速检测仪距离为 50 米，请问这辆小汽车超速了吗？为什么？文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
20、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z
21、5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
22、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z
23、5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
24、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z
25、5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
26、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4精编学习资料欢迎下载A D C B 27、已知：如图，四边形ABCD 中 AB=BC=1，CD=3，AD=1，且B=90 。试求：（1）BAD 的度数。（2）四边形 ABCD 的面积（结果保留根号）28、如果一个正整数能表示为两个连续偶数的平方差，那么称这个正整数为“神秘数”。如 4=2202，12=4222，20=6242，因此，4，12，20 这三个数都是神秘数。（1）28 和 2012 这两个数是神秘数吗？为什么
27、？（2）设两个连续偶数为2k+2 和 2k（其中 k 取非负数），由这两个连续偶数构成的神秘数是 4 的倍数吗？为什么？（3）两个连续奇数的平方差（取正数）是神秘吗？为什么？文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A
28、6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H
29、3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A
30、6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H
31、3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A
32、6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H
33、3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4精编学习资料欢迎下载试卷三、北师大版八年级上册数学期中测试卷数学参考答案（本试卷满分 120 分，考试时间 120分钟）数学试题参考答案一、ABACD CDCCD CD 二、13、/3、
34、514、3.14 15、15x4y316、1 17、2004 18、直角19、5+29+4020、1 三、21、4x 22、40 x 四、23、m(m+3)(m 3)24、(xy)(x+1)(x1)五、25、2ab=2 六、26、由题意得 AC=30m AB=50m ACB=90 BC=)(4030502222mACAB小车行驶速度为40 2=20米/秒即为 20 3600=72千米/小时72 千米/小时 70 千米/小时这辆小车超速了。27、连结 AC AB=BC=1,B=90AC=21122又AD=1,DC=3(3)=12+(2)2即 CD2=AD2+AC2DAC=90 AB=BC=1 B
35、AC=BCA=45 BAD=135(2)由（1）可知文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3
36、O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6
37、W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3
38、O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6
39、W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3
40、O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6
41、W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4精编学习资料欢迎下载 ABC 和ADC 是 RtS四边形ABCD=SABC+SADC=1 121+1 2 21=21+2228、（1）28=82-62 2012=5042-5022 28 和 2012这两个数都是神秘数。（2）设这两个连续偶数构成的神秘数为x x=(2k+2)-(2k)2=4(2k+1)这两
42、个连续偶数构成的神秘数是4 的倍数。（3）由（2）可得，神秘数可表示为4(2k+1)，因为(2k+1)是奇数，因此神秘数是 4 的倍数，但一定不是8 的倍数。设定两个奇数为 2n+1和 2n-1，则(2n+1)2(2n-1)2=8n.两个连续奇数的平方差是8 的倍数两个连续奇数的平方差不是神秘数。文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
43、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z
44、5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
45、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z
46、5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG
47、2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4文档编码:CJ1L4Z5A6W5 HX7F1R8A8P9 ZG2H3O3T8F4