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【免费下载】精编江苏省盐城市射阳县实验初级中学20222023学年七年级上学期10月月考数学试题

  • 2026-11-04 00:50:16
【免费下载】精编江苏省盐城市射阳县实验初级中学20222023学年七年级上学期10月月考数学试题

2022年秋学期

七年级巩固练习数学试卷

一、选择题(每题3分,计2

二、4分)

1. 若收入3元记为+3,则支出2元记为()

A. 1B. -1C. 2D. -2

2. 下列计算结果为3的是(  )

A. B. C. D. 

3. 有理数中,绝对值最大的数是()

AB. C. 0D. 

4. 与相等的是()

AB. C. D. 

5. 在下列有理数中:,负数有()

A. 1个B. 2个C. 3个D. 4个

6. 下列式子书写规范的是()

A. B. C. 2+a元D. 

7. 实数c,d在数轴上的对应点如图所示,则下列式子正确的是()

A. B. C. D. 

8. 现代的数学符号体系,不仅使得数学语言变得简洁明了,还能更好地帮助人们总结出便于运算的各种运算法则,简明地揭示数量之间的相互关系.我国在年清朝学堂的课本中还用“”来表示相当于的代数式,观察其中的规律,“”表示的代数式为(  )

A. B. C. D. 

二、填空题(每题3分,计24分)

9. 若实数a的相反数是,则a的值是_____.

10. 2022年5月22日,中国科学院生物多样性委员会发布《中国生物物种名录》2022版,共收录物种及种下单元约138000个.数据138000用科学记数法表示为______.

11. 若a,b互为相反数,c的倒数是3,则的值为_____.

12. 实数a,b在数轴上对应点的位置如图所示,则a______.(填“>”“=”或“<”)

13. 已知与互为相反数,则_____.

14. 在﹣3,﹣2,﹣1,4,5中取出三个数,把三个数相乘,所得到的最大乘积是_.

15. 将字母“C”,“H”按照如图所示的规律摆放,依次下去,则第4个图形中字母“H”的个数是_____.

16. 桌子上有只杯口朝上的茶杯,每次翻转只,经过次翻转可使这只杯子的杯口全部朝下,则的最小值为_____.

三、解答题(共102分)

17. 把下列各数填在相应的集合内:;

整数集合:{…};分数集合:{…};

负数集合:{…};非正整数集合:{…}.

18. 画一条数轴,在数轴上表示下列各数,并用“”连接:

19. 计算

(1)

(2)

(3)

(4)

20解答下列问题:

请你参考黑板中老师讲解,用运算律简便计算(请写出具体的解题过程):

(1);

(2).

21. 已知.

(1)若,求的值

(2)若,求的值.

22. 计算:

圆圆在做作业时,发现题中有一个数字被墨水污染了.如果被污染数字是,请计算.

下面是圆圆同学计算一道题的过程:

.

圆圆同学这样算正确吗?如果正确,请解释理由;如果不正确,请你写出正确的计算过程.

23. 国庆期间某特技飞行队进行特技表演,其中一架飞机起飞后的高度变化如表:

高度变化

记作

上升

下降

上升

下降

(1)如果飞机每上升或下降1千米需消耗2升燃油,那么这架飞机在这4个动作表演过程中,一共消耗了多少升燃油?

(2)另一架飞机做特技表演时,有4个规定动作,起飞后高度变化如下:上升千米,下降千米,再上升千米.若要使飞机最终比起飞点高出1千米,问第4个动作是上升还是下降,上升或下降多少千米?

24. 你会玩“24点”游戏吗?从一副扑克牌(去掉大、小王)中任意抽取4张,根据牌面上的数字进行加减乘除混合运算(每张牌只能用一次),使得运算结果为24或,其中红色扑克牌(红桃、方块)代表负数,黑色扑克牌(黑桃、梅花)代表正数,J、Q、K分别代表11,12,13.例如:抽到了黑桃7,黑桃3,梅花3,梅花7,运用下面的方法凑成了24:.

(1)如果抽到的是黑桃7,黑桃3,红桃3,梅花7,你能凑成24吗?试写出一个算式使其结果等于24.

(2)如果抽到的四张牌是“黑桃7、3,红桃3和梅花Q”,试写出一个算式使其结果等于.

25. 阅读探究:

;;;;…

(1)根据上述规律,求的值;

(2)你能用一个含有n(n为正整数)的算式表示这个规律吗?请直接写出这个算式(不计算);

(3)利用你发现的规律,计算下面算式的值:.

26. 如图,半径为1的小圆与半径为2的大圆上有一点与数轴上原点重合,两圆在数轴上做无滑动的滚动,小圆的运动速度为每秒π个单位,大圆的运动速度为每秒3π个单位.

(1)若大圆沿数轴向左滚动1周,则该圆与数轴重合的点所表示的数是;

(2)若大圆不动,小圆沿数轴来回滚动,规定小圆向右滚动时间记为正数,向左滚动时间记为负数,依次滚动的情况记录如下(单位:秒):

①第几次滚动后,小圆离原点最远?

②当小圆结束运动时,小圆运动的路程共有多少?此时两圆与数轴重合的点之间的距离是多少?(结果保留)

(3)若两圆同时在数轴上各自沿着某一方向连续滚动,滚动一段时间后两圆与数轴重合的点之间相距,求此时大圆与数轴重合的点所表示的数.(结果保留)

27. 点A、B在数轴上分别表示有理数a、b,A、B两点之间的距离表示为,在数轴上A、B两点之间的距离.例如:数轴上表示3和5的两点之间的距离是,数轴上表示1和的两点之间的距离是.

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  131. /www/wwwroot/yeyulingfeng.com/vendor/topthink/framework/src/think/Response.php ( 8.81 KB )
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  133. /www/wwwroot/yeyulingfeng.com/vendor/topthink/framework/src/think/Cookie.php ( 6.06 KB )
  134. /www/wwwroot/yeyulingfeng.com/vendor/topthink/think-view/src/Think.php ( 8.38 KB )
  135. /www/wwwroot/yeyulingfeng.com/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
  136. /www/wwwroot/yeyulingfeng.com/vendor/topthink/think-template/src/Template.php ( 46.61 KB )
  137. /www/wwwroot/yeyulingfeng.com/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /www/wwwroot/yeyulingfeng.com/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /www/wwwroot/yeyulingfeng.com/runtime/temp/44b959ca79ad33496f044db2c231b11d.php ( 8.29 KB )
  140. /www/wwwroot/yeyulingfeng.com/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000515s ] mysql:host=172.18.0.4;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000789s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000387s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000332s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000667s ]
  6. SELECT * FROM `set` [ RunTime:0.000315s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000669s ]
  8. SELECT * FROM `article` WHERE `id` = 468833 LIMIT 1 [ RunTime:0.000490s ]
  9. UPDATE `article` SET `lasttime` = 1793956428 WHERE `id` = 468833 [ RunTime:0.001971s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000373s ]
  11. SELECT * FROM `article` WHERE `id` < 468833 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000549s ]
  12. SELECT * FROM `article` WHERE `id` > 468833 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000395s ]
  13. SELECT * FROM `article` WHERE `id` < 468833 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004067s ]
  14. SELECT * FROM `article` WHERE `id` < 468833 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000761s ]
  15. SELECT * FROM `article` WHERE `id` < 468833 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000694s ]
0.096709s