23-24七年级上·北京海淀·期中
名校
1 . 如图,用围棋子按下面的规律摆图形,则摆第
个图形需要围棋子的枚数是__________ ,第
个图形需要围棋子的枚数是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/389ba9ef-0099-403b-8a62-3fe51bfeade5.jpg?resizew=175)
您最近一年使用:0次
2023-10-31更新
|
323次组卷
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5卷引用:山东省滨州市阳信县2023-2024学年七年级上学期期中数学试题
山东省滨州市阳信县2023-2024学年七年级上学期期中数学试题(已下线)北京市海淀区2023-2024学年七年级上学期期中模拟数学试题B卷北京市丰台区北京市第十二中学2023-2024学年七年级上学期期中数学试题天津市河东区2023-2024学年七年级上学期期中数学试题北京市第十二中学2023-2024学年七年级上学期期中数学试题
名校
2 . 如图是我国古代数学家杨辉最早发现的,称为“杨辉三角”.它的发现比西方要早五百年左右,由此可见我国古代数学的成就是非常值得中华民族自豪的!“杨辉三角”中有许多规律,如它的每一行的数字正好对应了
(n为非负整数)的展开式中a按次数从大到小排列的项的系数.
根据上述规律,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e21aa297ef514637ba8a6338402f9fe.png)
__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5abcb3802cf02be93a8c89067bd49a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/22f15933-d579-4dae-95b7-7d09330e5a98.png?resizew=352)
根据上述规律,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e21aa297ef514637ba8a6338402f9fe.png)
您最近一年使用:0次
2023-10-28更新
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4卷引用:山东省枣庄市滕州市滕州育才中学2023-2024学年七年级上学期期中数学试题
3 . 观察下列等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
,将以上三个等式两边分别相加得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
.
(1)猜想并写出
;
(2)求:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1978720b41e5b79714a8bc5692ff4bc1.png)
;
(3)探究并计算:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1cd9f5433594f0a1059d4b1c3058ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)猜想并写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0238657619e3f3b63c0affd5d3b7492.png)
(2)求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1978720b41e5b79714a8bc5692ff4bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017e456192eb3866048bba6cc64c4dd3.png)
(3)探究并计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1bc323b03ecc37a6cbf16ce2d163fd.png)
您最近一年使用:0次
2023-10-11更新
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242次组卷
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8卷引用:山东省滨州市无棣县碣石山镇中学2023-2024学年七年级上学期第一次月考数学试题
山东省滨州市无棣县碣石山镇中学2023-2024学年七年级上学期第一次月考数学试题山东省滨州市惠民县2023-2024学年七年级上学期第一次质量检测数学试题(已下线)期中复习(压轴30题精选)-2023-2024学年七年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)(已下线)第02讲 代数式(5大题型)-【帮课堂】2023-2024学年七年级数学上册同步学与练(浙教版)陕西西安西电附中2020-2021学年1七年级上学期第一次月考数学试题(已下线)专题1.42 有理数混合运算31题(培优篇)(专项练习)-2022-2023学年七年级数学上册基础知识专项讲练(人教版)(已下线)专题2.33 有理数混合运算31题(培优篇)(专项练习)-2022-2023学年七年级数学上册基础知识专项讲练(北师大版)江苏省盐城市滨海县滨淮初中教育集团2022-2023学年上学期七年级第一次学情检测数学试题
4 . 如图,在第1个
中,
,
;在边
上任取一点D,延长
到
,使
,得到第2个
;在边
上任取一点E,延长
到A,使
.得到第3个
按此做法继续下去,则第
个三角形中以
为顶点的内角度数是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e827641feb4179bca7033ed8760bf728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b162a86038237777ffd5052f5d9a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31600b262ae1241cd73738c34bbb9789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee3e259eccb7e77b3f4f2fe60fda24c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32f1d6db99180ae7ee8af66f423dded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33369e998e9365bb5a28840c3eae6f95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863b937063fac3fab3037ff0a6c64961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039af66355ed85ff4c204931b882b694.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/02734c8b-6acf-4be4-b99e-db8e4be9fddd.png?resizew=315)
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2023-09-20更新
|
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2卷引用:山东省潍坊市高密市滨北学校2023-2024学年八年级上学期10月月考数学试题
真题
5 . 如图①,正方形
的面积为1.
(1)如图②,延长
到
,使
,延长
到
,使
,则四边形
的面积为______;
(2)如图③,延长
到
,使
,延长
到
,使
,则四边形
的面积为______;
(3)延长
到
,使
,延长
到
,使
,则四边形
的面积为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/06583c80-f018-4172-b721-00ae55b9327a.png?resizew=443)
(1)如图②,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2485d9e0222b56807e70740f943d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed48453df1da4602435041ba354dc273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe123a65ae510ce76181de33e190bf8.png)
(2)如图③,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1599166befb5b76597f6163d445411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd966944512187b2be28d12f1cc6f42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7ea844628f601afcbaea15136b7af8.png)
(3)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11a7c21be5a907b608399d50252571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411c1e8cabd4839317833cd94c7d9e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68aa5cc571252d34e85e3cbcdbd6a273.png)
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4卷引用:2023年山东省青岛市中考数学真题
2023年山东省青岛市中考数学真题山东省青岛市城阳区2023-2024学年九年级上学期10月月考数学试题吉林省松原市前郭县第三中学2023-2024学年度八年级上册学业质量检测(月考二) 数学试题(已下线)专题9.30 正方形(直通中考)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)
6 . 如图是用棋子摆出的一组有规律的图案,其中,第1个图案有7枚棋子,第2个图案有13枚棋子,第3个图案有19枚棋子,……,按此规律摆下去,第n个图案有________ 枚棋子(用含n的代数式表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/15/244477a4-b156-4a81-8cc3-c0ec88c1d2ca.png?resizew=200)
您最近一年使用:0次
2023-09-15更新
|
114次组卷
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3卷引用:山东省枣庄市薛城区2023-2024学年七年级上学期期中数学试题
7 . 如图,某品牌自行车每节链条的长度为
,交叉重叠部分的圆的直径为
.
(1)观察图形,填写如表;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/8f031009-8606-47e6-93d0-b7a91d6f648f.png?resizew=515)
(2)如果一辆自行车的链条(安装以后)共由
节链条组成,那么链条的总长度是 __________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0794c29dd67ce995cb4ac622fb0555c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a27a670a3cf2ea69157d39c8e9c27d.png)
(1)观察图形,填写如表;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/8f031009-8606-47e6-93d0-b7a91d6f648f.png?resizew=515)
链条节数/ | … | ||||
链条长度/ | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
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8 . (1)如图,用一方框在月历表中任意框出四个数,将其中最小的数记为a,则其他三个数分别用含a的代数式表示为_________;(按从小到大顺序填写)
(2)若将框出的四个数按照
的方式进行计算,当方框在月历表中平移时,所框出的四个数运算结果会随方框位置移动而变化吗?为什么?
(2)若将框出的四个数按照
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25ef92be2871c3a1eff15b4e2e58654.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/937dcd59-b48d-442f-844a-a9fa4e0c7381.png?resizew=215)
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9 . 有一列数按一定规律排列:
,
,
,
,
,
,则第
个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9d4e04c0e8d1c83fb4084d2e13f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ec52740d0f79caa23c3331b075b917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5615c423cf07995a5f855e04c7d5d4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 观察下列等式:第1个等式为:
;第2个等式为:
;第3个等式为:
…根据等式所反映的规律,解答下列问题:
(1)第4个等式为_________;
(2)猜想:第n个等式为_________(n为正整数);
(3)根据你的猜想,计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c5be3902bdd7a291bc555011e83622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f351179825f54c9d7ddceb34ad833c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f891c3d75b913b78964faa4c3398d79e.png)
(1)第4个等式为_________;
(2)猜想:第n个等式为_________(n为正整数);
(3)根据你的猜想,计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4053ab5b26e1afe5d503f9c8e34e36e2.png)
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2023-08-13更新
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91次组卷
|
2卷引用:山东省日照市五莲县2022-2023学年七年级下学期期中数学试题