haihongyuan.com
海量文库 文档专家
全站搜索:
您现在的位置:首页 > 初中教育 > 初中数学初中数学

七年级数学第三章实数测试题

发布时间:2014-04-05 11:52:34  

七年级数学(上)第三章检测卷 实数(综合)

班级: 姓名:

一、选择题(每小题3分,共30分)

1、立方根为8的数是 ·········································································································· ( )

A、512 B、64 C、2 D、±2

2、已知正数m满足条件m2=39,则m的整数部分为 ····················································· ( )

A、9 B、8 C、7 D、6

3、下列说法错误的是 ·········································································································· ( )

A、实数与数轴上的点一一对应

B、无限小数未必是无理数,但无理数一定是无限小数

C、分数总是可以化成小数,但小数未必能转化为分数

D、有理数都可以表示成有限小数或无限循环小数

4、下列各式正确的是 ·········································································································· ( )

A16=±4 B64=4 3C、-9=-3 D、116 =4 93

5、一个数的平方根和它的立方根相等,则这个数是 ························································ ( )

A、1 B、0 C、1或0 D、1或0或-1

6x+10+y-13=0,则x+y的值是 ·································································· ( )

A、13 B、3 C、-3 D、23

7、两个连续自然数,前一个数的算术平方根是x,则后一个数的算术平方根是 ············ ( )

A、x+1

2A 333B、x+1 2C、x+1 D、x+1 28、下列四个数中,比0小的数是 ······················································································· ( ) B2 C、π D、-1 9、若x+y=0,则x与y的关系是 ················································································ ( )

A、x=y=0

33B、x与y的值相等 C、x与y互为倒数 D、 x与y互为相反数 310、如果23.7=2.872,23700=28.72,则0.0237= ··················································· ( )

A、0.2872 B、28.72

二、填空题(每空2分,共30分)

11表示

112、的立方根为 ; 27

13、±25=-8= ;

14、写出两个负无理数:

第1页 3C、2.872 D、0.02872

15、比较大小:π3.14, - -1.5;

16、在之间,整数个数是

17、在数轴上一个点到原点距离为22,则这个数为;

18x的平方根是±4,那么x=64的平方根是;

19、已知a=-5,则a2= ;

20、观察下列各式:32-12=2×4 ,42-12=3×5 ,52-12=4×6 ,……,则

102-12= ;

21、如果x2=9,则x= ,x3=-8,则x= 。

三、解答题(共60分)

22、计算:(每题2分,共12分)

(1)81

(3

(5)25-125 33(2)1.96 1 9 16(4)0.729 3(6327 9

23、(6分)琳琳家有一个面积为30m2的正方形活动室,那么请你求出这个正方形活动室的边长,

并判断边长是不是有理数,为什么?

第2页

网站首页网站地图 站长统计
All rights reserved Powered by 海文库
copyright ©right 2010-2011。
文档资料库内容来自网络,如有侵犯请联系客服。zhit326@126.com