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(2026秋)六年级上期中考试数学模拟卷二

  • 2026-10-24 12:02:00
(2026秋)六年级上期中考试数学模拟卷二

(2026秋)六年级上期中考试数学模拟卷二

一.选择题(共10小题)

1.在这七个数中,非负数有(  )

A.3个B.4个C.5个D.6个

2.如图所示为一无盖长方体盒子的展开图(重叠部分不计),则该无盖长方体的容积为(  )

A.4B.8C.16D.64

3.在学校组织的“传统文化进校园”活动中,礼堂的电子屏上,以古典民乐为背景音,滚动播放由一个立方体与其平面展开图相互转化形成的视频.这个立方体的六个面上分别有:梅、兰、竹、菊、松、柏,同学们能看到的一个展开图是(  )

4.如图是一个有理数混合运算的程序流程图,当输入的数为﹣2,输出的结果是(  )

A.1B.2C.D.

5.已知有理数a,b在数轴上的对应点的位置如图所示,则下列式子中正确的是(  )

A.a﹣b>0B.b﹣a>0C.ab>0D.a+b>0

6.手机支付给生活带来便捷,如图是王老师某日微信账单的收支明细(正数表示收入,负数表示支出,单位:元),王老师当天微信收支的最终结果是(  )

A.收入14元B.支出3元C.支出18元D.支出10元

7.下列各组数中,数值相等的是(  )

A.﹣(﹣2)与﹣|﹣2|B.﹣22与(﹣2)2

C.与D.42与(﹣2)4

8.已知a2=16,|b|=2,且b<a,则ba的值为(  )

A.8或﹣8B.16或﹣16C.16D.8

9.由一些大小相同的小正方体搭成的几何体的从正面看和从左面看如图,则搭成该几何体的小正方体的个数最少是(  )

A.3B.4C.5D.6

10.已知数轴上的点A,B分别表示数a,b,其中﹣1<a<0,0<b<1.若a×b=c,数C在数轴上用点C表示,则点A,B,C在数轴上的位置可能是(  )

二.填空题(共5小题)

11.将如图所示的平面展开图按虚线折叠成正方体后,相对面上两个数互为相反数,则x﹣2y= .

12.已知|x|=3,y3=8,且xy<0,那么(x+y)2024=  .

13.观察如图所示的8个几何体.

(1)按序号写出各自几何体的名称:②     ;⑥ ;

(2)在以上几何体中,是柱体的有  (填序号);含曲面的有  (填序号).

14.规定一种新运算:当a≤b时,a⊗b=a﹣b;当a>b时,a⊗b=a+b.

       求(﹣5)⊗(﹣2)= .  

15.如图,这是由若干个小立方体搭起来的几何体的正面、侧面所看到的图,那么这个几何体至少应该由 个小立方体组成.

三.解答题(共8小题)

16.把下列各数填在相应的大括号里.

,﹣1,0,0.81,+6,﹣3.1,10%,.

整数集合:{ …};

分数集合:{ …};

非负整数集合:{ …};

有理数集合:   { …}.

17.画一条数轴,先把下列各数在数轴上表示出来,再按从小到大的顺序用“<”号把这些数连接起来:

,|﹣2.5|,0,﹣22,﹣(﹣4).

18.计算:

(1);

(2);

(3);

(4).

19.如图所示,一个几何体由若干个棱长为1cm的小正方体搭成.

(1)请画出从正面、上面看到的这个几何体的形状图.

(2)这个几何体的表面积为cm2.

(3)重新用小立方块搭一个几何体,使得从正面、上面看到的该几何体的形状图与你在方格中所画一致,则搭这样一个几何体最少要 个小立方块,最多可以 个小立方块.

20.我们知道,在数轴上,|a表示数a到原点的距离,这是绝对值的几何意义.进一步地,|a﹣b|表示数轴上数a与数b对应点之间的距离.

例如:|3﹣1|表示3与1两数在数轴上所对应的两点之间的距离;|3+1|=|3﹣(﹣1)|,所以|3+1|表示3与﹣1两数在数轴上所对应的两点之间的距离.

(1)数轴上表示2和﹣3的两点之间的距离是 ;

(2)数轴上点A表示的数为x,点B表示的数为﹣1,则A、B两点之间的距离可以表示为 ;若|AB|=3,则x= ;

(3)找出所有符合条件的整数x,使得|x+2|+|x﹣1|=3,这样的整数有 个.

21.如图是一个几何体的展开图:

(1)写出该几何体的名称 ;

(2)用一个平面去截该几何体,截面形状可能是 (填序号);

①三角形;②四边形;③五边形;④六边形.

(3)根据图中标注的长度(单位:cm),求该几何体的体积.

22.如图,观察下列几何体并回答问题.

(1)请观察所给几何体的面、棱、顶点的数量并归纳出n棱柱有  个面, 条棱, 个顶点,n棱锥有  个面, 条棱, 个顶点;    

(2)所有像三棱柱、四棱柱、六棱柱、三棱锥等这样由四个或四个以上多边形所围成的立体图形叫做多面体,经过前人们归纳总结发现,多面体的面数F,顶点个数V以及棱的条数E存在着一定的关系,请根据(1)总结出这个关系为  .

23.从2开始,连续的偶数相加,它们和的情况如表:

加数的个数n

S

1

2=1×2

2

2+4=2×3

3

2+4+6=3×4

4

2+4+6+8=4×5

5

2+4+6+8+10=5×6

(1)若n=8时,则S的值为  .

(2)根据表中的规律猜想:用含n的式子表示S为:S=2+4+6+8+…+2n= .

(3)根据(2)中的规律计算:2+4+6+…+200+202的值.

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  1. CONNECT:[ UseTime:0.000458s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000622s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000332s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000371s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000511s ]
  6. SELECT * FROM `set` [ RunTime:0.000261s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000558s ]
  8. SELECT * FROM `article` WHERE `id` = 526386 LIMIT 1 [ RunTime:0.000334s ]
  9. UPDATE `article` SET `lasttime` = 1792910818 WHERE `id` = 526386 [ RunTime:0.001480s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000301s ]
  11. SELECT * FROM `article` WHERE `id` < 526386 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000426s ]
  12. SELECT * FROM `article` WHERE `id` > 526386 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000381s ]
  13. SELECT * FROM `article` WHERE `id` < 526386 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000622s ]
  14. SELECT * FROM `article` WHERE `id` < 526386 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000574s ]
  15. SELECT * FROM `article` WHERE `id` < 526386 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000616s ]
0.092011s