如图,在一条不完整的数轴上从左到右有点A,B,C,其中A,B之间的距离是3,B,C之间的距离是2.设点A,B,C所对应的数之和是m,点A,B,C所对应的数之积是n.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/b0a2c4b3-9044-4b75-a8d1-307cdf0dbf6d.png?resizew=180)
(1)①若以B为原点,写出点A,C所对应的数.并计算m的值;
②若以C为原点,m又是多少?
(2)若原点在点C的右边,且C到原点的距离是4,求n的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/b0a2c4b3-9044-4b75-a8d1-307cdf0dbf6d.png?resizew=180)
(1)①若以B为原点,写出点A,C所对应的数.并计算m的值;
②若以C为原点,m又是多少?
(2)若原点在点C的右边,且C到原点的距离是4,求n的值.
更新时间:2023-02-12 09:14:06
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【推荐1】已知,如图1:数轴上有A、B、C三点,点A表示的数为-5, 点B表示的数为13, 点C表示的数为-2,将一条长为9个单位长度的线段MN放在该数轴上(点M在点N的左边).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/8dc8afa8-b731-4778-9424-dcc1f8830eb9.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/57a1ff09-a8e9-479d-b356-90e8212c6590.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/6aa001c2-bd8f-4f4b-b119-a9bc4bffca97.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/503cea7d-fe96-42c9-a9d2-0c7383942faf.png?resizew=479)
(1)求线段AB中点表示的数;
(2)如图2:若从点M与点A重合开始,将线段MN以0.3个单位长度/秒的速度沿数轴向右移动,经过x秒后,点N恰为线段BC的中点,求x的值;
(3)如图3:在(2)的基础上,若线段MN向右移动的同时,动点P从点C开始以0.6个单位长度/秒的速度也沿数轴向右移动,设移动的时间为t秒,当P、N、B三个点中恰有一个点为另两个点所组成线段的中点时,求t的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/8dc8afa8-b731-4778-9424-dcc1f8830eb9.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/57a1ff09-a8e9-479d-b356-90e8212c6590.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/6aa001c2-bd8f-4f4b-b119-a9bc4bffca97.png?resizew=479)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/503cea7d-fe96-42c9-a9d2-0c7383942faf.png?resizew=479)
(1)求线段AB中点表示的数;
(2)如图2:若从点M与点A重合开始,将线段MN以0.3个单位长度/秒的速度沿数轴向右移动,经过x秒后,点N恰为线段BC的中点,求x的值;
(3)如图3:在(2)的基础上,若线段MN向右移动的同时,动点P从点C开始以0.6个单位长度/秒的速度也沿数轴向右移动,设移动的时间为t秒,当P、N、B三个点中恰有一个点为另两个点所组成线段的中点时,求t的值.
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【推荐2】如图,在一条数轴上从左至右取
,
,
三点,使得
,
到原点
的距离相等,且
到
的距离为4个单位长度,
到
的距离为8个单位长度.
(1)在数轴上点
表示的数是 ,点
表示的数是 ,点
表示的数是 .
(2)在数轴上,甲从点
出发以每秒3个单位长度的速度向右做匀速运动,同时乙从点
出发也向右做匀速运动.
①若甲恰好在点
追上乙,求乙的运动速度.
②若丙从点
出发以每秒1个单位长度的速度向左做匀速运动,甲、乙、丙同时开始运动,甲与丙相遇后1秒,乙与丙的距离为1个单位长度,求乙的运动速度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)在数轴上点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在数轴上,甲从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①若甲恰好在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②若丙从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/2c70b84e-08f2-40e4-9f00-89e0c558d937.png?resizew=244)
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【推荐1】已知在纸面上有一数轴如图,根据给出的数轴,解答下面的问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/e90f9c38-164a-4153-82e0-3521ec6c78b1.png?resizew=390)
(1)请你根据图中
、
两点的位置,分别写出它们所表示的有理数;
(2)在数轴上画出与点
的距离为2的点(用不同于
、
的其他字母表示),并写出这些点表示的数;
(3)折叠纸面.若在数轴上
表示的点与5表示的点重合,回答以下问题:
①10表示的点与数______表示的点重合;
②若数轴上
、
两点之间的距离为2024(点
在点
的左侧),且
、
两点经折叠后重合,求
、
两点表示的数是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/e90f9c38-164a-4153-82e0-3521ec6c78b1.png?resizew=390)
(1)请你根据图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)在数轴上画出与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)折叠纸面.若在数轴上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
①10表示的点与数______表示的点重合;
②若数轴上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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【推荐2】如图数轴上有两个点
、
,分别表示的数是
,
请回答以下问题:
(1)
与
之间距离为 ,
,
中点对应的数为 ,
点向左平移
个单位对应的数为 .
(2)若点
对应的数为
,只移动
点,要使得
,
,
其中一点到另两点之间的距离相等,请写出所有的移动方法.
(3)若点
从
点出发,以每秒
个单位长度的速度向左作匀速运动,点
从
出发,以每秒
个单位长度的速度向左作匀速运动,
,
同时运动:
①当点
运动多少秒时,点
和点
重合?
②当点
运动多少秒时,
,
之间的距离为
个单位长度?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6b990f8d4bd4ef888f8f0730fcc1c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/463841e7-59c1-4fbb-9dc2-2781504dc8f2.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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【推荐3】我们知道:如果点A、B在数轴上分别表示有理数a、b,那么在数轴上A、B两点之间的距离AB=|a-b|.所以式子|x-3|的几何意义是数轴上表示有理数x的点与表示有理数3的点之间的距离.利用这个结论,请结合数轴解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/9a449556-74b9-4948-99d6-d49be2fea9c8.png?resizew=286)
(1)数轴上表示0和3的两点之间的距离是 ;数轴上表示-1和-4的两点之间的距离是 ;数轴上表示1和-4的两点之间的距离是 .
(2)数轴上表示x和-1的两点之间的距离可以表示为|x-(-1)|,即:|x+1|.如果|x+1|=2,那么x= .
(3)如果数轴上表示数x的点位于2与-3之间,那么|x-2|+|x+3|的值为 .
(4)当x取 时,
=|x+3|;当x取 时,|x-2|+|x+2|=6.
(5)当x取 时,|x+3|+|x-1|+|x-5|的值最小,最小值是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/9a449556-74b9-4948-99d6-d49be2fea9c8.png?resizew=286)
(1)数轴上表示0和3的两点之间的距离是 ;数轴上表示-1和-4的两点之间的距离是 ;数轴上表示1和-4的两点之间的距离是 .
(2)数轴上表示x和-1的两点之间的距离可以表示为|x-(-1)|,即:|x+1|.如果|x+1|=2,那么x= .
(3)如果数轴上表示数x的点位于2与-3之间,那么|x-2|+|x+3|的值为 .
(4)当x取 时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc82d290b40a208ee0e1cae479f11df8.png)
(5)当x取 时,|x+3|+|x-1|+|x-5|的值最小,最小值是
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【推荐1】仔细观察下列三组数:第一组:1,
,9,
,
,… 第二组:
,8,
,
,
,…第三组:
,
,
,
,
,…
(1)第一组的第8个数是 ;
(2)第二组的第n个数是 ;
(3)分别取每一组的第
个数,计算这三个数的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec54f53122364c46e1e43d1a84f210fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06fc7811f9525e8b8c833746d6af5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cd48b9f4a2d6fdc3fa433d920b48a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dda9531f4e1bf44f26e6ccbba13ef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4fd4507c507c55250a3a59e738dce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1dfc770fc27e0b9bf602ec2f842ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f2af6b635f2f3e49274116b98295da.png)
(1)第一组的第8个数是 ;
(2)第二组的第n个数是 ;
(3)分别取每一组的第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
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【推荐2】计算下列各式
a是不为1的有理数,我们把
称为a的差倒数.例如,3的差倒数是
,-1的差倒数是
,已知
,
是
的差倒数,
是
的差倒数,依此类推.
(1)分别求出
,
,
,
的值.
(2)计算
的值.
(3)请直接写出
的值.
(4)
.
a是不为1的有理数,我们把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ebf5e8c5ac0fc22e01967fd0c79bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2285398ccaf5938e14ac55e182c494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b0c585c482ad8531d20bb5c32a6608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(1)分别求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e8ab57234dfc54a5315381c59c94f6.png)
(3)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e40a465e7bb55b18a2fcb7522b96ed.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dff6cb1f94ce0f8566d2ad0da05040b.png)
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐1】发现:存在三个连续整数使得这三个连续整数的和等于这三个连续整数的积;
验证:连续整数
,
,
______(填“满足”或“不满足”)这种关系;
连续整数2,3,4,______(填“满足”或“不满足”)这种关系;
延伸:设中间整数为n
(1)列式表示出三个连续整数的和、积,并分别化简;
(2)再写出一组符合“发现”要求的连续整数(直接写结果).
验证:连续整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
连续整数2,3,4,______(填“满足”或“不满足”)这种关系;
延伸:设中间整数为n
(1)列式表示出三个连续整数的和、积,并分别化简;
(2)再写出一组符合“发现”要求的连续整数(直接写结果).
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在数−5,1,−3,5,−2中任取三个数相乘,其中最大的积是a,最小的积是b,
(1)求a,b的值;
(2)若|x+a|+(y−b)2=0,求(x−y)+y的值.
(1)求a,b的值;
(2)若|x+a|+(y−b)2=0,求(x−y)+y的值.
您最近一年使用:0次