七年级数学第一次阶段测试题举例

2024-08-07

七年级数学第一次阶段测试题举例(精选6篇)

七年级数学第一次阶段测试题举例 第1篇

8.4.1 三元一次方程组解法举例练习

教学目标

1.理解三元一次方程组的含义.

2.会解某个方程只有两元的简单的三元一次方程组.

3.掌握解三元一次方程组过程中化三元为二元或一元的思路.

教学重点

1.使学生会解简单的三元一次方程组.

2.通过本节学习,进一步体会“消元”的基本思想.

教学难点

针对方程组的特点,灵活使用代入法、加减法等重要方法.

导入新课

前面我们学习了二元一次方程组的解法.有些问题,可以设出两个未知数,列出二元一次方程组来求解.实际上,有不少问题中含有更多的未知数.大家看下面的问题.

教学过程 活动与探究

习题8.4 拓广探索

2abc, 解:由已知,得20abc,93ababcc.2934 ②-①,得b=-11,④

由③得7736a76b=0,⑤

④代入⑤,得a=6. ⑥

a6,a6, 把代入①,得c=3,因此,b11,b11c3. 答:a=6,b=-11,c=3.

备课资料

参考例题

3x2yz6, 1.已知方程组6xy2z2,与关于x,y,z的方程组6x2y5z3axby2cz2,2ax3by4cz1,相同,求a,b,c的3ax3by5cz1值.

x:y3:2, 2.解方程组y:z5:4,xyz66. 3.在y=ax+bx+c中,当x=1,2,3时,y=0,3,28,求a,b,c的值.当x=-1时,y•的值是多少?

答案: 2 1.分析:因为两个方程组的解相同,即x,y,z取值相同,可求解第一个方程组中的x,y,z,代入第二个方程组后,求解a,b,c.

1x,3x2yz6,3 解:解方程组6xy2z2,解得y2,6x2y5z3,z1.1x,axby2cz2,3把y2,2ax3by4cz1,z13ax3by5cz1, a9,1解得b,2c1.a2b2c2,32a6b4c1,3a6b5c1. 2.提示:将①②变为x=x30, 答案:y20,z16.32y,z=

45y后求解.

abc0, 3.解:由题意,得4a2bc3,解得9a3bc28.2

a11,b30, c19. 所以y=11x-30x+19. 所以当x=-1时,y=11×(-1)-30×(-1)+19=60.

七年级数学第一次阶段测试题举例 第2篇

1、下列方程中,是一元一次方程的是()

A、B、C、D、2、方程的解是,则等于()

A、B、C、D、3、将左边的正方体展开能得到的图形是()

4、右边几何体的俯视图是()

5、如图,用一根质地均匀长30厘米的直尺和一些相同棋子做实验。已知支点到直尺左右两端的距离分别为a,b,通过实验可得如下结论:

左端棋子数×a=右端棋子数×b,直尺就能平衡。现在已知a=10厘米并且左端放了4枚棋子,那么右端需放几枚棋子,直尺才能平衡?()

A、8枚B、4枚

C、2枚D、1枚

6、方程去分母后可得()

A、3x—3=1+2x,B、3x—9=1+2x,C、3x—3=2+2x,D、3x—12=2+4x;

7、观察下图,把左边的图形绕着给定直线旋转一周后可能形成的几何体()

8、把在各个面上写有同样顺序的数字1~6的五个正方体木块排成一排(如图所示),那么与数字6相对的面上写的数字是

A。2B。

3C。5D。以上都不对

9。A、B两地相距1260千米,慢车以50千米/小时的速度从A地出发,同时一列快车以70千米/小时的速度从B地出发相向而行,当两车相距60千米时,两车行驶了()

A。9。5小时B。10小时C。1l小时D。12小时

10。学友书店推出售书优惠方案:①一次性购书不超过100元,不享受优惠;②一次性购书超过100元但不超过200元一律打九折;③一次性购书200元一律打八折。如果王明同学一次性购书付款162元,那么王明所购书的原价一定为【】

A。180元 B。202。5元C。180元或202。5元D。180元或200元

二、填空题(每小题2分共24分)

11、一个数x的2倍减去7的差,得36,列方程为_____________________________

12、如图所示,在天秤的左盘上的两个物品取下一个,右盘取下_____个砝码才能使天秤仍然平衡

13、当x=时,代数式4x—5与3x—9的值互为相反数。

14、一张桌子上重叠摆放了若干枚面值一元的硬币,从三个不同方向看它得到的平面图形如下:

那么桌上共有___________枚硬币。

15。已知是方程的解,则的值是______________。

16。若|x—2y+3|+|x—1|=0,则代数式3(x—y)+2的值为______________。

17。已知代数式的值为9,则代数式的值为_______________

18、关于x的方程(a+2)x|a|—1—2=1是一元一次方程,则a=。

19、关于x的一元一次方程2x+a=x+1的解是—4,则方程—ay+1=3的解为:y=________________

20。一张桌子有一张桌面和四条腿拼装而成,若做一张桌面需要木材0。03m3,做一条腿需要木材0。002m3。现在做这一批桌子,恰好用去木材3。8m3,共做多少张桌子?(只要列出方程)解:设共做x张桌子,所列方程式为。

21。两年期定期储蓄的年利率为2。25%,按国家规定,所得利息要缴纳20%的利息税。李大爷于2008年9月存入银行一笔钱,2010年9月到期时,共得税后利息684元,则他2008年9月的存款额为____________________

22。如图所示的某种玩具是由两个正方体用胶水粘合而

成的,它们的棱长分别为1分米和3分米,为了美观,现要

在其表面喷涂油漆,已知喷涂l平方分米需用油漆3克,喷涂这个玩具共需油漆_________克。

三、解答题

23、(本题4分)如右上图所示,电视台的摄像机1、2、3、4在不同位置拍摄了四幅画面,则A图象是______号摄像机所拍,B图象是______号摄像机所拍,C图象是______号摄像机所拍,D图象是______号摄像机所拍

24、解方程(本题共5×4=20分)

友情提示注意符号问题,要求写出必要的演算步骤。

25。(本题12分)在平整的地面上,有若干个完全相同的棱长为1cm的小正方体堆成一个几何体,如图所示。

(1)这个几何体由个小正方体组成,请画出这个几何体的三视图。

主视图左视图俯视图

(2)如果在这个几何体的表面喷上黄色的漆,则在所有的小正方体中,有个正方体只有一个面是黄色,有个正方体只有两个面是黄色,有个正方体只有三个面是黄色。

(3)若现在你手头还有一些相同的小正方体,如果保持俯视图和左视图不变,最多可以再添加几个小正方体?这时如果要重新给这个几何体表面喷上红漆,需要喷漆的面积比原几何体增加还是减少了?增加或减少了多少cm2?

26。(本题满分6分)我们定义一种新运算:a*b=2a—b+ab(等号右边为通常意义的运算):

(1)计算:2*(—3)的值;(2)解方程:。

27。(本题6分)小明在商店里看中了一件夹克衫,店家说:“我这儿所有商品都是在进价上加50%的利润再标价的,这件夹克衫我给你按标价打8折,你就付168元,我可只赚了你8元钱啊!”聪明的小明经过思考后觉得店家的说法不可信,请你通过方程思想,说明店家是否诚信?

28。(本题8分)为了鼓励居民节约用水,某市自来水公司按如下方式对每户月用水量进行计费:当用水量不超过10吨时,每吨的收费标准相同;当用水量超过10吨时,超出10吨的部分每吨收费标准也相同。下表是小明家1—4月份用水量和交费情况:

月份1234

用水量(吨)8101215

费用(元)16202635

请根据表格中提供的信息,回答以下问题:

(1)若小明家5月份用水量为20吨,则应缴水费多少元?

七年级数学第一次阶段测试题举例 第3篇

Ⅰ. 单项选择。(每小题1分,共20分)

()1. This car is too dear (昂贵的). I cant ______ it.

A. afford B. sell C. playD. like

()2. They have T-shirts ______ green and black for only $18.

A. at B. with C. in D. on

()3. —The skirt is only ten yuan. —Ill ______ it.

A. buy B. sell C. take D. sale

()4. —______?—Yes, please. I want a shirt.

A. Can I help you B. Do you have skirts

C. Do you want a shirtD. What do you like

()5. The pants are ______ sale ______ only 20 dollars.

A. for; on B. on; for C. at; for D. for; at

()6. —Here is your T-shirt. —______.

A. OKB. Thank youC. Yes, it is D. Youre welcome

()7. My brothers birthday is ______ June sixth.

A. at B. onC. in D. to

()8. —______ are you?—Im thirteen.

A. How old B. WhenC. What D. Where

()9. ______ you have an Art Festival at your school?

A. DoB. Are C. Does D. Is

()10. Robert is fifteen ______.

A. year oldsB. year oldC. years old D. years-old

()11. John and William are ______ the same age.

A. onB. atC. in D. to

()12. —______ is the date today? —Its December twelfth.

A. WhatB. When C. Where D. How

()13. My brother likes thrillers ______ I think theyre scary.

A. and B. but C. or D. so

()14. What ______ movies does your brother like?

A. kind B. kind ofC. the kind of D. a kind of

()15. —______ is your favorite actor? —Jackie Chan.

A. WhatB. HowC. Who D. Where

()16. He ____ the interesting book.

A. really likes B. likes really C. really like D. like really

()17. I like to ______ movies. My brother likes to ______ TV.

A. look; watch B. see; watch C. look at; see D. see; look at

()18. I ______ Shaolin Temple ______ exciting. I dont like it.

A. think; isntB. think; is

C. dont think; is D. dont think; isnt

()19. Robert likes comedies. Maria likes them, ______.

A. onlyB. also C. tooD. to

()20. Edward often goes to movies ______ his friend Mike.

A. fromB. for C. to D. with

Ⅱ. 根据句意和首字母提示,写出空白处所缺的单词。(每小题1分,共10分)

21. I get the school bag at Mr Cools store at a very good p______.

22. —How much is the red bag? —Its thirty d______.

23. February is the s______ month of a year.

24. They will have a school t______ on Saturday.

25. March the t______ is the Tree Planting Day (植树节).

26. My f______ movie is Kung Fu Panda.

27. You can learn about Chinese h______ from Beijing Opera.

28. This n______ movie is very successful.

29. Lily o______ goes to a movie on weekends.

30. Rick is Jets teacher, so (因此) Jet is Ricks s______.

Ⅲ. 完形填空。(每小题1分,共10分)

Dear Frank,

How are you? You like to go to a movie. It____31____good. I like movies, too. I like comedies____32____theyre funny. I dont like documentaries. I think theyre____33____. My sister Wang Min doesnt like____34____, either.____35____you? Do you like action movies? I have a friend, Tom. He likes action movies____36____. He thinks they are funny and exciting. His favorite movie is Rush Hour. Its____37____action movie. Jackie Chan is____38____the movie. Tom sees____39____action movies. So he can____40____Chinese kung fu (中国功夫). Is it interesting?

Whats your favorite kind of movies?

Yours,

Zhang Wei

()31. A. looksB. soundsC. likesD. sees

()32. A. and B. but C. becauseD. so

()33. A. boring B. excitingC. scary D. funny

()34. A. themB. it C. they D. their

()35. A. What are B. How about C. How are D. Why

()36. A. muchB. veryC. very muchD. many

()37. A. aB. an C. theD. /

()38. A. in B. on C. at D. of

()39. A. lots ofB. a lot C. lots D. a lots of

()40. A. to doB. does C. doing D. do

Ⅳ. 阅读理解。(每小题2分,共30分)

A

Dear Lily,

When you go to Huaxing Store, could you please return (退) for me my new soccer ball shoes? They are black. I dont like the color. Please get a pair of blue shoes for me. Theyre on sale and cost $40. The receipt (收据) for the black shoes is in the case with the shoes.

Thanks!

Dave

根据短文内容,选择最佳答案。

()41. What does Dave buy in Huaxing Store?

A. Pants. B. Shoes.C. T-shirt. D. Sweater.

()42. Why doesnt Dave like his new shoes?

A. Because he doesnt like the color. B. Because theyre too small.

C. Because theyre too cheap.D. Because they cost too much.

()43. What color of shoes does Dave like now (现在)?

A. Black. B. White. C. Blue. D. Yellow.

()44. How much are the shoes?

A. $40. B. $60.C. $70.D. $30.

()45. Where is the receipt?

A. Its in the shoes. B. Its in the shoes case.

C. Mike lost (丢失) it. D. Its in Huaxing Store.

B

It is October 31. Its my birthday today.

My parents are workers(工人). They dont have lunch at home because (因为) the factory (工厂) is far away from my home. My parents cant make much money (钱). I cant have a birthday party and cant have good food. I think they forget (忘记) my birthday.

When I am doing my homework, someone is knocking (敲) at the door. I open (打开) it. “Happy birthday, Tina!” Johnson, Lisa and Sandra stand (站) outside (在……外面) the door. They have a birthday cake and some good food in their hands (手). I am too happy to say a word. (我太高兴以致于说不出话。)

At about six, my parents come back. To my surprise (令我吃惊的是), my parents bring a birthday cake and some good food for me! I have the great birthday with my friends and parents for the first time in my life.

根据短文内容,选择最佳答案。

()46. Tinas birthday is on ______.

A. October 31B. October 30C. October 13D. October 1

()47. Tinas parents are ______.

A. teachers B. workers C. actorsD. students

()48. Tinas parents work ______.

A. near their homeB. far away from their home C. at home D. at a school

()49. The friends come to have a ______ with Tina.

A. look B. restC. birthday partyD. contest

()50. Tinas parents dont ______ her birthday.

A. likeB. rememberC. findD. forget

C

Tim and his father are in Beijing now. They think Beijing Opera is very funny and great. They often watch Beijing Opera at home on weekends. But Tims classmates usually like to go to movies. Tims father likes Chinese history. At home, Tim also reads some sad, funny or interesting Chinese stories. In a word (总而言之), they love China.

根据短文内容,判断正(T)误(F)。

()51. Tim doesnt like China.

()52. Tim stays in Beijing with his father.

()53. Tim often go to movies on weekends.

()54. Tims father likes Chinese history and Beijing Opera.

()55. Tim likes action movies and Beijing Opera.

Ⅴ. 汉译英。(每空1分,共10分)

根据汉语句子的意思,完成英语句子。每空填一词。

56. 你的衬衫是什么颜色的?

______ ______ is your shirt?

57. 让我看看你的新毛衣。

Let me ______ a look ______ your new sweater.

58. —维拉喜欢这次音乐比赛吗?

—非常喜欢。

—Does Vera like the ______ ______?

—Yes, she likes it very much.

59. 我很喜欢中国的动作片。

I like Chinese ______ ______ very much.

60. 我认为这部电影非常令人激动。

I ______ this movie is very ______.

Ⅵ. 补全对话。(每小题2分,共10分)

Alice: Can I help you? Tony:____61____I want a hat.

Alice: What color do you like? Tony: Red and yellow.

Alice: What about this one?Tony: Can I try it on?

Alice: Yes. Tony:____62____Alice: How about the yellow one? Its smaller (稍小的).

Tony: Hmm ... Its good.____63____Alice: Its 39 yuan. Tony:____64____Here is the money. Thank you. Alice:____65____

61. ___________________________ 62. ___________________________

63. ___________________________ 64. ___________________________

65. ___________________________

Ⅶ. 书面表达。(10分)

假设你是从四川汶川新来的学生,请根据表格中所提供的信息,用英语作一下自我介绍。

要求:不少于50词。

______________________________________________________________________________

______________________________________________________________________________

七年级数学上册第一单元测试题 第4篇

6. 7.≤ 8.n-m 9.±1 10.32

11①-5 ②6 ③12 ④

12① ②

③ ④

13.10千米

14. ①2 ②-3

15.①最高分:92分;最低分70分.

②低于80分的学生有5人。所占百分比50%.

七年级数学第一、二章测试 第5篇

班级_______姓名____________学号_______

一、填空

1、在数轴上距原点3个单位长度的点表示的数是___________.12、1的相反数是_______,它的倒数是_______,它的绝对值是______.33、最大的负整数是 _________,最小的正整数是_________.4

4、在72评价________ 中的底数是__________,指数是_____________.+120045、12003=______________。

6、代数式2x+3y的值是-4,则3+6x+9y的值是

二、选择题

1、一个数加上12等于5,则这个数是()

A.17B.7C.17D.72、4等于()3

A.12B.12C.64D.6

4三、计算

11、+231 2332、82(4)1

223、100224、7p3p2p12p3p 3

四、先化简,在求值

1、化简求值:2x2yxy3x2yxy4x2y,其中x1,y

七年级数学第一次阶段测试题举例 第6篇

一、选择题

1、方程=x-2的解是()

A.5 B.-5 C.2 D.-

22、解方程x=,正确的是()

A.x==x=;B.x=,x=C.x=,x=;D.x=,x=

3、下列变形是根据等式的性质的是()

A.由2x﹣1=3得2x=4B.由x2=x得x=

1C.由x2=9得x=3D.由2x﹣1=3x得5x=﹣14、下列变形错误的是()

A.由x+7=5得x+7-7=5-7;B.由3x-2=2x+1得x=

3C.由4-3x=4x-3得4+3=4x+3xD.由-2x=3得x=-

5、已知方程①3x-1=2x+1②③④中,解为x=2的是方程()

A.①、②和③;B.①、③和④C.②、③和④;D.①、②和④

二、填空题

1、判断:方程6x=4x+5,变形得6x+4x=5()

改正:________________________________________________.2、方程3y=,两边都除以3,得y=1()

改正:________________________________________________.3、某数的4倍减去3比这个数的一半大4,则这个数为__________.4、当m=__________时,方程2x+m=x+1的解为x=-4.当a=____________时,方程3x2a-2=4是一元一次方程.6、求作一个方程,使它的解为-5,这个方程为__________.三、解下列方程

(1)6x=3x-12(2)2y―=y―

3(3)-2x=-3x+8(4)56=3x+32-2x

(5)3x―7+6x=4x―8(6)7.9x+1.58+x=7.9x-8.42【知能升级】

1、2a—3x=12是关于x的方程.在解这个方程时,粗心的小虎误将-3x看做3x,得方程的解为x=3.请你帮助小虎求出原方程的解.2、在代数式|()+6|+|0.2+2()|的括号中分别填入一个数,使代数式的值等于0.答案

【基础过关】

一、选择题

1、A2、C3、A4、D5、D

二、填空题

1、错,6x-4x=

52、错,y=3、24、5,6、x+5=0

三、解下列方程

1、x=-

42、y=

3、x=84、x=245、x=

6、x=-10

【知能升级】

1、x=-

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