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1、数轴、相反数、绝对值（习题）巩固练习1.下列图形表示数轴正确的是（）0101234-1AB012-1-2-2-1210CD2.下列说法正确的是（）A正数和负数统称有理数B正整数和负整数统称为整数C小数 3.14不是分数D整数和分数统称为有理数3.下列各组数中，互为相反数的是（）A(3.2)-与3.2-B2.3与2.31-C(4.9)-与4.9 D(1)-与(1)-4.下列说法正确的是（）A数轴是一条规定了原点、正方向和单位长度的射线B离原点近的点所对应的有理数较小C任意一个有理数都可以用数轴上的一个点来表示D原点在数轴的正中间5.关于相反数的叙述，错误的是（）A两数之和为 0，则这两个数互为相
2、反数B到原点距离相等的点所表示的两个数互为相反数C符号相反的两个数，一定互为相反数D零的相反数是零6.任何一个有理数的绝对值一定（）A大于 0 B小于 0 C不大于 0 D不小于 0 7.如果aa，那么 a是（）A正数B负数C非正数D非负数8.下列说法正确的是（）A绝对值等于它本身的数是正数B相反数等于它本身的数是负数C相反数等于它本身的数是0 D任意一个数小于它的绝对值9.如图，若点 A，B，C所对应的数为 a，b，c，则下列大小关系错误的是（）CBA-3-2-13210AbcaBabc-Cbca-Dacb-10.有如下一些数：-3，3.14，-20，0，6.8，0.34，12-，9-，其中
3、是非正整数的有 _ 11.在数轴上点 A表示-1，点B表示-0.5，则离原点较近的是点_ 12.在数轴上距离原点为 2的点所对应的数为 _，它们互为_ 13.数轴上-1所对应的点为 A，将点A向右移 4个单位再向左移 6个单位，则此时点 A到原点的距离为 _ 14.绝对值最小的数是 _；绝对值越小，则该数在数轴上所对应的点离原点越 _15.若0 x，则x-_；若mn，则nm-_16.填空：（1）43=_ _；-（2）21=_-；（3）32_ _-；（4）33=_42-文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4
4、D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R
5、6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ1
6、0Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6
7、C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G
8、1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:C
9、J10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 H
10、Z6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2思考小结1.在数轴上距离原点 3 个单位长度的点表示的数是_2.若字母 a 表示一个有理数，则-a 一定是负数吗？我们的思考过程是这样的：-a 表示 a 的相反数，若 a 为正数，则-a 为_；-a 表示 a 的相反数，若 a 为 0，则-a 为_；-a 表示 a 的相反数，若 a 为负数，则-a 为_ 综上：若字母 a 表示一个有理数，则-a 可能是正数、负数或0，因此，-a_（“一定”
11、或“不一定”）是负数3.请判断下列说法的正误（对的打“”，错的打“”）（1）所有的有理数都能用数轴上的点表示（）（2）符号不同的两个数互为相反数（）（3）有理数分为正数和负数（）（4）最小的正数是 1（）（5）最大的负整数是-1（）（6）绝对值最小的数是 0（）（7）绝对值等于它本身的数是 0和1（）（8）相反数等于它本身的数是 0和1（）文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:C
12、J10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 H
13、Z6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY
14、1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码
15、:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6
16、 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7
17、ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档
18、编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2【参考答案】巩固练习1.D 2.D 3.A 4.C 5.C 6.D 7.B 8.C 9.D 10.-3，-20，0 11.B 12.2，相反数13.3 14.0，近15.-x，-n+m16.（1）4，3，1（2）2，1，1（3）3，2，6（4）34，32，34，23，12思考小结1.3 2.负数；0；正数不一定3.（1）；（2）；（3）；（4）；（5）；（6）；（7）；（8）文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 Z
19、Y1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编
20、码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G
21、6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7
22、 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文
23、档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z
24、7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2文档编码:CJ10Z9W6Z7G6 HZ6C4D6V6M7 ZY1G1R6F3K2