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七上期中数学阶段性评价【考前冲刺】

  • 2026-11-06 08:45:36
七上期中数学阶段性评价【考前冲刺】
2025-2026七年级上期期中数学阶段性评价
(全卷满分150分,考试时间120分钟)
A卷(满分100分)
一、选择题(每小题4分,共32分,答案涂在答题卡上)
1. 在体育课的立定跳远测试中,以2.00m为标准,若小明跳出了2.35m,可记作+0.35m,则小亮跳出了1.75m,应记作( )
A. +0.25m B. −0.25m C. +0.35m D. −0.35m
2. 如图所示的几何体是由7个大小相同的小立方块搭成,其左视图是( )
A.  B.  C.  D. 
3. 月球与地球之间的平均距离约为38.4万公里,38.4万用科学记数法表示为( )
A. 38.4×10⁴ B. 3.84×10⁵ C. 0.384×10⁶ D. 3.84×10⁶
4. 下列计算正确的是( )
A. 4a−2a=2 B. 2ab+3ba=5ab
C. a+a²=a³ D. 5x²y−3xy²=2xy
5. 下列结论中正确的是( )
A. 单项式xy²/4的系数是1/4,次数是4
B. 单项式m的次数是1,没有系数
C. 多项式2x²+xy²+3是二次多项式
D. 在1/x,2x+y,−a²b,x−y,0中,整式有4个
6. 多项式 x²−12kxy−5y²+xy−6合并同类项后不含xy项,则k的值是( )
A. 0 B. 1 C. 2 D. ﹣2
7. 若|a|=1,b²=16,且ab<0,则a+b=()
A. ±3 B. 3 C. 5 D. −5
8. 用长度相同的木棍按如图所示的规律拼出下列图案,其中第①个图案用了11根木棍,第②个图案用了14根木棍,第③个图案用了21根木棍,第④个图案用了24根木棍,……,按此规律下去,第9个图案用的木棍根数是( )
A. 41 B. 44 C. 45 D. 51

二、填空题(每小题4分,共20分,答案写在答题卡上)

9. −2的倒数是________,|−5|=________
10. 数轴上点A对应的数是−3,那么将点A向右移动4个单位长度,此时点A表示的数是______.
11. 若3x^(m+1)y³与−5x³y^n是同类项,则−mn=________.
12. 若(x+4)²与|y−3|互为相反数,则(x+y)^2025=______.
13. 如图所示是一个正方体表面展开图,若将其折叠成正方体后,相对面上的两个数字之和均为6,则x−y+z的值为______.
三、解答题(共48分,解答过程写在答题卡上)
14. 计算:
(1)36−76+−15−45
(2)−5−−5×120÷120×−5
(3)12−16+13×−48
(4)−12026×−7+4−9−27÷−32
15. 一个几何体是由大小相同的棱长为1的小立方体搭建而成,从上面看到的几何体的形状如图所示,其中小正方形中的数字表示在该位置的小立方体的个数.
(1)画出该几何体的主视图和左视图;
(2)求该几何体的体积和表面积.
16. (1)化简:5x²−3x−22x−3−4x²;
(2)先化简,再求值:3xy+x²y+xy−22xy−x²y,其中x=−1,y=2.
17. 如图所示是一个长方形.
(1)根据图中尺寸大小,用含x的代数式表示阴影部分的面积S;
(2)若x=3,求S的值.
18. 出租车司机小刘某天上午营运时是在南北走向的大街上进行的,如果规定向南开为正,向北开为负,起始点为原点,他这天上午所接六位乘客的行车里程(单位:km)如下:+4, −7, +1, +3, +3, −2,问:
(1)将最后一位乘客送到目的地时,小刘在原点南还是北,距离原点多远?
(2)若汽车耗油量为0.25(升/千米),这天上午小刘接送乘客,出租车共耗油多少升?
(3)若出租车起步价为9元,起步里程为3km(包括3km),超过3km部分每千米1.2元,小刘这天上午共得车费多少元?
B卷(满分50分)
一、填空题(每小题4分,共20分,答案写在答题卡上)
19. 若m²−2m+1=0,则2m²−4m+2026=______.
20. 若a、b互为相反数,c为最大的负整数,d的倒数等于它本身,则2a+2b−cd的值是__________.
21. 如图所示是由大小相同的小立方块搭成的几何体从正面和上面看到的形状图,则搭建该几何体最多需要______个小立方块,最少需要______个小立方块.
22. 有理数a,b,c在数轴上对应点的位置如图所示,化简:|2a+b|−|2a−c|−|3b+c|=______.
23. 如图,将形状、大小完全相同的★按照一定规律摆成下列图形,第1个图形中★的个数为a₁,第2个图形中★的个数为a₂,第3个图形中★的个数为a₃……依此类推,第n个图形中★的个数为aₙ,则1/a₁+1/a₂+1/a₃+···+1/a₂₀₂₆的值为______.
二、解答题(共30分,解答过程写在答题卡上)
24. 已知多项式M=2x²+3xy+2y−2x²+x+yx+1.
(1)当|x−1|+(y−2)²=0,求M的值;
(2)若多项式M与字母x的取值无关,求y的值.
25. 阅读材料并解答下列问题:
在小学,我们知道像12,27,45,108,…这样的自然数能被3整除.一般地,如果一个自然数的所有数位上的数字之和能被3整除,那么这个自然数就能被3整除.你能说明其中的道理吗?先看两位数的情形,若一个两位数的十位、个位上的数字分别为a,b,则通常记这个两位数为ab,于是ab=10a+b=9a+(a+b).显然9a能被3整除,因此,如果a+b可以被3整除,那么9a+(a+b)就能被3整除,即ab能被3整除.
(1)请你用类似的方法表示任意一个三位数;
(2)猜想一个三位数满足什么条件时能被9整除?并说明理由:
(3)已知一个三位数的十位数上的数字比百位数上的数字的2倍大3,个位上的数字是百位上数字的3倍,这个数能被3整除吗?请说明理由;
(4)直接写出一个四位数满足什么条件时,它可以被4整除?
26. 如图1,已知数轴上的点A对应的数是a,点B对应的数是b,且满足(a+4)²+|b−2|=0.
(1)求数轴上到点A、点B距离相等的点C对应的数.
(2)动点P从点A出发,以2个单位长度/秒的速度向右运动,设运动时间为t秒,问:是否存在某个时刻t,恰好使得P到点A的距离是点P到点B的距离的3倍?若存在,请求出t的值;若不存在,请说明理由.
(3)如图2,在数轴上的点M和点N处各竖立一个挡板(点M在原点左侧,点N在原点右侧),数轴上甲、乙两个弹珠同时从原点出发,甲弹珠以1.5个单位长度/秒的速度沿数轴向左运动,乙弹珠以1个单位长度/秒的速度沿数轴向右运动.两弹珠遇到挡板后均立即以原速度向反方向运动,若甲、乙两个弹珠第一次相遇的位置恰好到点M和点N的距离相等.试探究点M对应的数与点N对应的数是否满足某种数量关系,请写出它们的关系式,并说明理由.
如需电子版请自取 配套PDF以及参考解析 👈🏻👈🏻
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  1. CONNECT:[ UseTime:0.000673s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000804s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000378s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000307s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000519s ]
  6. SELECT * FROM `set` [ RunTime:0.000292s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000597s ]
  8. SELECT * FROM `article` WHERE `id` = 538606 LIMIT 1 [ RunTime:0.000346s ]
  9. UPDATE `article` SET `lasttime` = 1794002616 WHERE `id` = 538606 [ RunTime:0.001392s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000372s ]
  11. SELECT * FROM `article` WHERE `id` < 538606 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000473s ]
  12. SELECT * FROM `article` WHERE `id` > 538606 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000426s ]
  13. SELECT * FROM `article` WHERE `id` < 538606 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000546s ]
  14. SELECT * FROM `article` WHERE `id` < 538606 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000654s ]
  15. SELECT * FROM `article` WHERE `id` < 538606 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000690s ]
0.088562s