1 . 如图所示,每张小纸带的长为
,宽为
,用胶水把它们粘贴成一张长纸带,接头部分宽
.用n张这样的小纸带如图粘贴成的纸带,其长度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/13b85d81-848e-4f3d-b773-90b642b10ca4.png?resizew=398)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/13b85d81-848e-4f3d-b773-90b642b10ca4.png?resizew=398)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图是由一些火柴棒搭成的图案:
(1)摆第3个图案用______ 根火柴棒.
(2)按照这种方式摆下去,摆第
个图案用______ 根火柴棒(
为正整数).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/1d627cb0-0de4-4c4f-a4f6-809743919e2f.png?resizew=326)
(1)摆第3个图案用
(2)按照这种方式摆下去,摆第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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3 . 用大小相同的圆点摆成如图所示的图案,按照这样的规律摆放,则第
个图案中共有圆点的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/309cde08-8351-473e-a022-fd3556b3cdc8.png?resizew=448)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/309cde08-8351-473e-a022-fd3556b3cdc8.png?resizew=448)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 如图,有一些点组成形如四边形的图案,每条“边”(包括顶点)有
个点.当
时,这个图形总的点数
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/baacf39d-4843-4232-b33a-a3ec07cfd8cc.png?resizew=265)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b310f50387a7bf766f95e8144fa52328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ea0392d4bd0374c8a2b12a355e4655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/baacf39d-4843-4232-b33a-a3ec07cfd8cc.png?resizew=265)
A.8080 | B.8084 | C.8088 | D.8092 |
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5 . 将正整数1至2023按照从左到右的顺序填入下面表格中:
规定:
表示第m行第n个数,如
表示第3行第2个数是20,记作
.
(1)
______;
(2)若
,则
______,
______;
(3)将表格中的“T”型格子看成一个整体并可以平移,所覆盖的4个数之和能否等于113?如果能,求出4个数中的最小数;如果不能,请说明理由;
(4)用含m、n的代表表示
______.
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
… |
规定:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff1f31ff1a97ec4907609992df726f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2284f4d6ecb00ba049df932473ad0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1420a8aa80af6584bd435691c4cb7a0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa089a22e818f1ea4389eacfbfc03db1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90b85b696ea6b418e14e9544b2b821f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(3)将表格中的“T”型格子看成一个整体并可以平移,所覆盖的4个数之和能否等于113?如果能,求出4个数中的最小数;如果不能,请说明理由;
(4)用含m、n的代表表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9fb8cfacbd0eea27aef997f02b6e8d.png)
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6 . 七年级一位同学用围棋棋子按照某种规律摆出“师大附中”中的“大”字,如图①,图②,图③,.….,按照这种规律,第n个“大”字中的棋子个数是______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/8e0feaf4-1f59-4f9e-9ed3-72442941982c.png?resizew=231)
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7 . 把正奇数
,
,
,
,
排成如图所示的
列,规定从上到下依次为第
行,第
行,第
行,
,从左到右依次为第
列至第
列.回答如下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/35dcf5b8-592b-49b9-9860-89aa60239588.png?resizew=227)
(1)①图表中第
列第
行的数为_____;
②图表中第
行第
列的数可表示为_____.(用含有
的代数式表示,要求化为最简形式)
(2)按如图所示的方法用一个“
”形框框住相邻的三个数,设被框的三个数中,最小的一个数为
,是否存在这样的
,使得被框的三个的数和等于
?若存在,求出
的值,若不存在,请说明理由.
(3)若在(2)中“
”形框框住的三个数的和记为“
”,则
的最大值与最小值的差等于_____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2030a7c508abe4b2a03bc702cf7692d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/35dcf5b8-592b-49b9-9860-89aa60239588.png?resizew=227)
(1)①图表中第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
②图表中第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)按如图所示的方法用一个“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa83681a17608a1784ae1df4682f5c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若在(2)中“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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8 . 观察下列三行数:
①2,4,6,8,…
②
,
,
,
,
,…
③0,5,10,15,20,…
(1)第①行的第9个数是________,第
个数是________;
(2)第②行的第
个数是________,第③行的第
个数是________;(用含n的代数式表示)
(3)如图,用一个长方形方框框住六个数,左右移动方框,框住的六个数之和可以用含n的代数式表示.则当
时,框住的六个数字之和为___________.(直接写出结果即可)
①2,4,6,8,…
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eed5ece335b63af168c7c36d2121947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f88b597e0729b052743f9d8b7923b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4014daff61e2c227e7a38e4caf3a82e8.png)
③0,5,10,15,20,…
(1)第①行的第9个数是________,第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)第②行的第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)如图,用一个长方形方框框住六个数,左右移动方框,框住的六个数之和可以用含n的代数式表示.则当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c91fd038f8b7ab27b1913f92d2930c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/c45c4b34-fb90-4352-92a0-ad8f352c563b.png?resizew=252)
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9 . 一个两位数,个位数字为
,十位数字为
,则这个两位数可以表示为__________ .(用含有
的式子表示,要求化简)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b8d3f7a166ff5db92d9ee0014a960d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec824c0d1f50fcfb4edb05c4bbf8645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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10 . 观察下面倒“品”字形中各数之间的规律,根据观察到的规律,写出
与
关系式________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/6064bbdb-8ba2-4702-b5c5-76e8bd0b9daf.png?resizew=318)
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