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七年级上册数学寒假作业答案2017

字典 时间:2003-10-14

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七年级上册数学寒假作业答案人教版2015年
篇一:七年级上册数学寒假作业答案2017

为了保证孩子们过一个快乐的寒假充实的寒假,家长朋友们一定要监督孩子们的学习。查字典数学网初中频道为大家提供了七年级上册数学寒假作业答案,希望大家认真阅读。1. 选择题1A 2D 3A 4C2. 填空(1)T=20-6h 20,6 T h h(2)Q=6x105-pt 6x105 p Q t 06x105/p(3)S=1.5b

(4) 07 05 5 03.解答题(1)y= Q/a-x Q/a (0a)(2)y=80-2x20(3) ①-23②当x=3,y有最小值为1/2③当-20,y随x的增大而增大,当03,y随x的增大而减小(4)①`v=800-50t②016③当t=8时 , v=800-50x8=400④当v=100时,100=800-50tT=14第5页第7页选择题1B 2C 3C 4B 5B 6A 7B 8D填空(1)1 (2)y=2x+1 -1 (3)m3 (4)y=-3x+3(5)y=x+3 (6)y=64x+48 (7)S=2n+1

(8)y=1/5 x-6 30解答题(1) 设y=kx+b-4k+b=156k+b= -5k= -2 b=7y= -2x+7(2)略(3)①表示y与x的关系,x为自变量②10时离家10km 13时离家30km③12时-13时,离家30km④13km⑤2时-13时⑥15km/h第9页第11页1. 选择题(1)A (2)C (3)C2.填空(1)y=-2x (2)m2

(3)y=5x+3 (4)y2y1 (5)y=-2x+100 25(6)93.解答题(1) ① Q=200+20t② (030)(2) ①y=80 (050)y=1.9x-15 (50100)②y=1.6x③选择方式一(3)①在同一直线上 y=25/72x②当x=72时,y=25当x=144时,y=50当x=216时,y=75y=25/72 x (0345.6)③当x=158.4时,y=25/72x158.4=55(4) ①y甲=2x+180y乙=2.5x+140②当x=100时,y甲=200+180=380Y乙=140+250=390380〈390租甲车更活算第13页第15页1.选择题(1)D (2)C (3)C2.填空

(1)x=2y=3(2)x=2 x2(3)-3 -2 x= -5/8 y= -1/8(4)1/2 0 x=2y=3(5)y=5/4 x2. 解答题3. (1)略(2)①依题意-k+b= -52k+b=1解得k=2 b= -3y=2x+3当y0 时2x-33/2②当x2时,2x4则2x-31即y1(3) ①y会员卡=0.35+15y租书卡=0.5x②若y会员卡〈y租书卡则0.35x+150.5xx100租书超过100天,会员卡比租书卡更合算(4)设A(m,n)1/2x4xm=6m=3n=2A ( -3, -2)y=2/3x , y= -2/3x -4(5) ① y甲=0.8x1.5X+900=1.2x+900 (x500)Y乙=1.5x+900x0.6=1.5x+540 (x500)②若y 甲=y乙

2016年-2017学年数学寒假作业(六)
篇二:七年级上册数学寒假作业答案2017

2016年-2017学年数学

寒假作业(六)

一.解答题(共30小题)

1.如图,在六边形的顶点分别填人数1、2、3、4、5、6,使任意三个相邻顶点的三数之和都不小于9.

2.已知a=+12,b=﹣7,c=﹣(|﹣19|﹣|﹣8|),求a+|﹣c|+|b|的值.

3.有四只书箱,甲、乙两箱共有书86本,乙、丙两箱共有书88本,丙、丁两箱共有91本,问甲、丁两箱共有几本书?

4.列式计算:

(1)﹣2与7的和的相反数加上﹣5是多少?

(2)已知两数的和是﹣6,其中一个加数是2,求另一个加数.

5.计算.

(1)(﹣0.9)+(﹣0.87);

(2)

(3)(﹣5.25)+

(4)(﹣89)+0;

(5)

(6); . ; ;

6.一只青蛙从井底向上爬,第一次向上爬了5米,下滑了3米,第二次向爬了4米,下滑了2米,第三次向上爬了6米,下滑了3米,则青蛙共向上爬了多少米?

7.列式计算:

(1)比﹣18的相反数大﹣30的数;

(2)75的相反数与﹣24的绝对值的和.

8.计算

(1)(﹣45)+(+32)

(2)(﹣7)+(﹣3)

(3)|﹣3|+|﹣9|

(4)(﹣3.1)﹣6.9

(5)(﹣22)+0

(6)(﹣3.125)﹣(﹣3)

(7)(﹣7.9)+4.3+2.9+(﹣1.3)

(8)(﹣12)+13+(﹣18)+16+(﹣5)

(9)15+(﹣20)+28+(﹣10)+(﹣15)

(10)(﹣)+++(﹣)+(﹣)

9.规定扑克牌中的黑色数字为正数,红色数字为负数,且J为11,Q为12,K为13,A为1,如图计算下列各组两张牌面数字之和.

10.分别写出一个含有三个加数且满足下列条件的等式

(1)所有加数都是负数,和为﹣15.

(2)至少有一个加数是正整数,和是﹣15.

11.1+(﹣2)+3+(﹣4)+…+99+(﹣100).

12.|m|=3,|n|=2,求m+n.

13.计算题

(1);

(2)(+2.7)+(﹣3.9).

14.某仓库第一天运进+100箱水果,第二天运进﹣70箱,第三天运进+55箱,第四天运进64箱,四天共运进仓库多少箱水果?

15.计算:

(1)(﹣0.6)+(+0.8)+(﹣3.4)+(+0.92)+1.98;

(2).

16.(﹣7.34)+(﹣12.74)+12.34+7.34.

17.将﹣1、﹣2、﹣3、﹣4、0、1、2、3、4这9个数字填入图中并使每行、列,对角线上的三个数字的和都相等.

18.(﹣3)+(﹣2.16)+8+3.125+(﹣3.84)+(﹣0.25).

19.将﹣4,﹣3,﹣2,﹣1,0,1,2,3,4这9个数分别填在如图1中的9个空格中,使得每行、每列、斜对角上的三个数相加的和均为0.再根据图1的结果填写图2,要求图2中空格内的数各不相等,且每行、每列、斜对角上的三个数相加的和相等.

20.运用加法的运算律计算下列各题:

(1)24+(﹣15)+7+(﹣20);

(2)18+(﹣12)+(﹣18)+12;

(3)1+(﹣2)+2+(﹣1).

21.计算:

(1)(﹣5.8)+(﹣4.3);

(2)(+7)+(﹣12);

(3)(﹣8)+0;

(4)(﹣6.25)+6.

22.将1,2,3,4,5,6,7这七个数字排成一排“1234567”,在这些数字中间加运算符号“+”,计算它们的和,其和刚好等于100,例如“1+23+4+5+67=100”,你还能写出一个类似的算式吗?试试看(注意不要改变数字的排列顺序哦).

23.将﹣2,﹣1,0,1,2,3,4,5,6这9个数分别填入如图方阵的9个空格中,使得横、竖、斜对角的3个数相加的和相等.

24.请你选取9个互不相等的整数,填入下表9个空格中,使得每行每列、斜对角的3个数相加均为0.

25.益智冲浪.

26.将﹣2,﹣1,0,1,2,3,4,5,6,7填入图中的10个方格里,每一个格填一个数使得田字形的4个方格中所填的数字之和都等于P,求P的最大值.

27.计算题:

(1)+5+(+17)

(2)﹣21+(﹣11)

(3)++(﹣)

(4)0+(﹣7.35)

(5)﹣+(+)+(﹣)+2

(6)﹣(﹣1)+(3)

(7)﹣|﹣|+|﹣|

(8)﹣|﹣(+17)+(+3)|+(﹣4)

(9)(+)+(﹣2.5)+(﹣5)+(+2.5)+

(10)+(﹣)+(﹣)+(+)

七年级上册数学寒假作业答案2017。

(11)(﹣)+(﹣)++(﹣)

(12)(+3)+(﹣21)+(﹣19)+(+12)+(+5)

28.例:1+2+3+…+100=?如果一个一个顺次相加显然太繁杂,我们仔细分析这100个连续自然数的规律和特点,发现运用加法的运算规律可大大简化计算,提高计算的速度.因为:1+2+3+…+100=(1+100)+(2+99)+…+(50+51)=101×

(1)补全例题解答过程;

(2)计算a+(a+d)+(a+2d)+…+(a+99d).

29.如图所示是一个方阵图,每行的3个数、每列的3个数、斜对角的3个数相加的和均相等,如果将方阵图中的每个数都加1同一个数,那么方阵书每行的3个数、每列的3个数、斜对角的3个数相加的和仍然相等,这样就成了一个新的方阵图,请按照所给数字,将新的方阵图补充完整.

30.某工厂计划二月份生产800吨产品,实际二月份生产了750吨,则它超额完成计划多少吨?

2016-2017学年数学寒假作业(十)
篇三:七年级上册数学寒假作业答案2017

2016-2017学年数学寒假作业(十)

一.选择题(共30小题)

1.下列说法正确的有( )

22①﹣mn和﹣3nm是同类项 ②3a﹣2的相反数是﹣3a+2

243③5mR的次数是3 ④3x是7次单项式.

A.1个 B.2个 C.3个 D.4个

2.在下列代数式中,﹣3x,,,,,π,,整式共有( )

A.4个 B.5个 C.6个 D.7个

3.在代数式,,,,中,整式共有(

A.0个 B.1个 C.3个 D.5个

4.下列单项式中,次数是5的是( )

A.35 B.23x2 C.y2x3 D.y2x

5.在下列关于单项式x的说法中,正确的是( )

A.x是系数为0,次数为0的单项式

B.x是系数为1,次数为1的单项式

C.x是系数为1,次数为0的单项式

D.x是系数为0,次数为1的单项式

6.下列说法中正确的是( )

A.0不是单项式 B.y没有系数 C.是二项式 D.﹣xy是单项式

7.单项式﹣a2b3c的系数与次数的和是( )

A.3 B.7 C.4 D.5

8.下列各式中为单项式的是( )

A.3x B.2x+1 C.5x2+4 D.4x2+3x

9.单项式﹣32x3y2的系数和次数分别是( )

A.﹣3,7 B.3,7 C.﹣9,5 D.﹣3,5

10.下列说法正确的是( )

A.20是单项式,系数是2 B.是二次式,系数是

C.3(a+b)是单项式 D.m﹣n是单项式

11.下列几个式子:,是单项式的有( )

A.3个 B.4个 C.5个 D.6个

12.如果单项式﹣xymzn和5x4yn都是5次单项式,那么m、n的值分别是( )

A.m=2,n=3 B.m=3,n=2 C.m=4,n=1 D.m=3,n=1

13.下面说法中,正确的是( )

A.xy+1是单项式 B.上是单项式

C.是单项式 D.x的系数为1,次数为1

第1页(共3页)

14.单项式﹣amb2c( )

A.系数是0,次数是m B.系数是1,次数是m

C.系数是﹣1,次数是m+2 D.系数是﹣1,次数是m+3

15.下列说法正确的是( )

A.2不是单项式 B.﹣2是一次单项式

C.x的指数是0 D.x的系数是1

16.﹣的系数为( )

A.π B.﹣π C.﹣ D.﹣

17.下列语句中错误的是( )

A.数字0也是单项式 B.单项式a的系数与次数都是1

C.﹣2x2y2是二次单项式 D.的系数是

18.下列关于单项式﹣的系数与次数说法中,正确的是( )

A.﹣,4 B.﹣,3 C.﹣5,4 D.﹣5,3

19.多项式3x2y2﹣y4﹣5xy2+y3+46的次数是( )

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

20.多项式3x﹣5x2+7中次数最高项是( )

A.3x B.﹣5x2 C.5x2 D.7

21.下列说法中,正确的是( )

A.、都是单项式

B.多项式由了、2a、5a2三项组成

C.a+b是二次二项式

D.如果一个多项式的次数是3,那么这个多项式中任何一项的次数都不大于3

22.多项式4x3﹣3x2y4+2m﹣7的项数与次数分别的是( )

A.4,9 B.4,6 C.3,9 D.3,10

23.多项式5﹣6x3y2+7x2y3﹣x4﹣x的次数为( )

A.14次 B.15次 C.5次 D.4次

24.多项式4x3﹣3x+8是( )

A.三次两项式 B.两次三项式 C.三次三项式 D.两次两项式

25.多项式﹣2a2b3+ab3+1的次数和项数分别为( )

A.5,2 B.4,3 C.3,5 D.5,3七年级上册数学寒假作业答案2017。

26.多项式的各项分别是( )

A.﹣x2,,﹣1 B.﹣x2,,﹣1 C.x2,,1 D.﹣x2,,﹣

27.对于多项式﹣x3﹣3x2+x﹣7,下列说法正确的是( )

A.最高次项是﹣x3 B.二次项系数是3

第2页(共3页)

1

C.是五次四项式 D.常数项是7

28.如果一个多项式的次数是4,那么这个多项式的任何一项的次数( )

A.都大于4 B.都小于4 C.都不小于4 D.都不大于4

42329.多项式3x﹣xy+4x﹣6的项数是( )

A.1 B.2 C.3 D.4

2230.多项式﹣2ab﹣3a+5b+2的项数和次数分别是( )

A.4,5 B.4,3 C.3,3 D.3,2

第3页(共3页)

新编2017小学一年级数学上册寒假作业7
篇四:七年级上册数学寒假作业答案2017

6+5= 2+3= 17-8= 7+3=

8+( )=10 11+( )=14 18-6○12(>、<或=) 9+10○16(>、<或=) 5+1= 8+3= 6-1= 7-2=

17-3-3= 2+( )=10 2+( )=14 18-6○12(>、<或=) 4○15-2(>、<或=) 解决问题:

小华看一本11页童话书,看了8页,还剩多少页没看? 9-2= 9+2= 10-7= 13-2=

4+( )=10 12+( )=12

4+7○6+6(>、<或=) 5+9○9(>、<或=) 8+2= 3+4= 7+8= 1+1= 14-1=

2+( )=10 ( )+4=7

19-6○12(>、<或=) 8+9○12(>、<或=) 解决问题:

6个小朋友堆雪人,又来了4个,一共有多少个小朋友?

5-4= 3+4= 8-3= 9+7=

8+( )=10 11+( )=12

14-2○12(>、<或=) 9+9○19(>、<或=) 2+2= 7+2= 7+9= 12-8= 17-3-4= 0+( )=10 ( )+7=7

15-1○12(>、<或=) 9+3○19(>、<或=) 解决问题:

树上有5只小鸟,又飞来2只,一共有多少只小鸟? 7+4= 2+3=

14-8+5= 6+1=

1+( )=10 6+( )=12

2+4○1+8(>、<或=) 9○11-10(>、<或=) 9+9-3= 7-4= 7+6= 7-0=

14-2-0= 7+( )=10 5+( )=12 17-4○12(>、<或=) 5+10○8(>、<或=) 解决问题:

合唱队有男生7人,女生比男生多10人,合唱队有女生多少人?

8+5-9= 6+8= 6+8= 10-2= 18-5-0= ( )+3=8 ( )+3=7

2+8○6+7(>、<或=) 5○12-5(>、<或=) 8+5-2= 8+4= 3+1= 2-1= 14-6=

2+( )=10 4+( )=12

4+9○1+2(>、<或=) 8+7○18(>、<或=) 解决问题:

小明买了6个算草本,5个小楷本,小明一共买了多少个本? 6+4= 4+6= 7+6= 4-1+3= 18-3=

( )+3=8 1+( )=14 13-3○12(>、<或=) 7+2○15(>、<或=) 7+2= 5-2= 7-2=

10-2+3= 12-4=

( )+6=8 ( )+3=7

7+1○4+3(>、<或=) 5+9○11(>、<或=) 解决问题:

9个小朋友堆雪人,又来了5个,一共有多少个小朋友?

2016-2017年度七年级上册学期英语寒假作业(8份)
篇五:七年级上册数学寒假作业答案2017

七年级英语寒假作业一

一、单项选择

( ) 1.---Boys and girls, please sit down . ----____________________.

A. That‟s OK B. NO. Stand up C. Thank you D. That‟s all right

( )2. Mum, _________ my friend Jane.

A. this‟s B. it is C. this is D. he is

( )3.--What‟s this ? --It‟s _______. ---What color is it? ---It‟s __________.

A. orange, an orange B. an orange, an orange

C. orange, orange D. an orange, orange

( ) 4. — Where ________ Millie and Lucy ________? — England.

A. is; come from B. do; from C. does; come from

( )5. _______are in the same class.

A. You, he and I B. I, you and he C. You, I and he D. He, you and I

( ) 6. There _______ a pen and two rubbers in the pencil box.

A. am B. is C. are D. be

( )7.What does she look like? She has ________________.

A. a long hair B. many long hairs C. long hair D. long hairs

( ) 8. ---_______ is your father? --- He‟s fine

A. How old B.How C. What D.Wh

( ) 9.Jim, ________ play ________ in the street. It‟s dangerous.

A. doesn‟t, football B. doesn‟t, the football

C. don‟t, football D. don‟t, the football

( )10. —Do you want to play basketball with us? — ________.

A. You‟re welcome B. Thank you very much

C. No, I don‟t think so D. Yes, I‟d love to.

二、完型填空

Sally and Tom are from England but now they live in Nanjing. They study at No.1 Middle School. They are

in the same grade, but in different Their classes begin eight a.m. They have Chinese, Maths and English lessons in the morning. In the

afternoon they have some lessons like Art, Music and P.E. They can English very well, but they aren‟t at Chinese. Miss Yang, their Chinese teacher often helps them their Chinese. They study hard at their lessons.

They both like Chinese culture (文化). Sally likes Chinese drawing and Tom enjoys Chinese Music.

After school they often their classmates. Their classmates are friendly to them. They say they learn

from their teachers and classmates at school. They love their teachers and classmates. They also love their

( )1.

( )2.

( )3.

( )4.

( )5. A. classes A. in A. others A. speak A. bad B. schools B. at B. else B. talk B. well C. lessons C. on C. other C. say C. good D. subjects D. of D. other‟s D. tell D. nice D. are; from

( )6.

( )7.

( )8.

( )9.

( )10.

三、阅读理解 A. in A. listening A. play A. a lot A. home B. with B. hearing B. chat B. a lot of B. family

A C. about C. listening to C. talk C. many C. school D. on D. hearing from D. play with D. lots of D. clothes

My favourite sport is basketball because it is very exciting. I like basketball because the NBA stars play very well. Basketball is very cheap and it is a good sport for our health. We can grow taller if we play basketball often. Also it keeps me fit. I play basketball three times a week. Most often I play it in my school. I often play it with my friends or I may play it myself. I feel very happy when I play basketball at school with my classmates. Sometimes I play basketball in the playground near my home. Basketball is very easy to play. If you play basketball very well, you can form a basketball team to take part in the competition. If you win the basketball competition, you will have the prize. You may become a famous basketball star.

( )1. I like basketball best because it‟s _______.

A. cheap B. good C. exciting D. famous

( )2. How many times do I play basketball every week?

A. five B. three C. four D. six

( )3. I often play basketball _________.

A. with my parents B. with my friends C. with my cousins D. myself

( )4. Why do I like basketball?

A. Because it‟s cheap B. Because it‟s good for health

C. Because the NBA stars play very well D. A, B and C

( )5. The beat title for the passage is _________.

A. Basketball player B. My favourite sport

C. Basketball star D. My favourite basketball star

B

Li Ping gets up early on weekdays, because he must go to school before 7:30. On Saturday and Sunday, he doesn‟t go to school, so he doesn‟t get up early.

He goes to the Drawing Club at 9:00 on Saturday mornings. He usually goes to the bookshop on Saturday afternoons, and after supper he watches TV until (直到) midnight.

He doesn‟t get up early on Sundays. Li Ping‟s parents both work on Sundays. Li Ping always watches TV after he gets up. Then he usually goes to KFC to have a hamburger and some juice for lunch. After that, he goes back home and starts to play football until his parents come back. He does his homework after supper. He usually has lots of weekend homework, so he must do it for three hours. He usually goes to bed at about 11:00 p.m. on Sundays. He often complains (抱怨) he has too much homework to do.

( )6. How often does Li Ping need to get up early?

A. Every day. B. Five days a week.

C. Only at the weekend. D. Every day except on Sundays.

( )7. What does Li Ping do on Sunday mornings?

A. He goes to have lessons. B. He watches TV.

C. He goes to the bookshop. D. He goes to a club.

( )8. When does Li Ping do his weekend homework?

A. On Sunday evenings. B. On Sunday mornings.

C. On Saturday evenings. D. On Sunday afternoons.

( )9. Why does Li Ping have lunch in KFC on Sundays?

A. Because he‟s too busy. B. Because his parents aren‟t at home.

C. Because he gets up too late. D. Because his parents have lunch in KFC.

( )10. Which of these is not right?

A. Li Ping doesn‟t exercise on Sundays.

B. Li Ping watches TV after supper on Saturdays.

C. Li Ping watches too much TV on Saturdays and Sundays.

D. Li Ping goes to bed late on Saturday and Sunday evenings.

四、任务型阅读 (共l0空;每空l分,计l0分)

阅读下列短文,根据短文中的信息完成文后表格。(每空一词)

Hi! Do you know the three children? They are in a happy family. Xiao Xue is a

helpful girl. She is beautiful. She likes study. She studies very hard. She gets up early

and finishes her breakfast quickly. Then she goes to school by bike. Liu Xing is a

little lazy. He gets up late and then washes his face, brushes his teeth in a hurry. Then

he goes to the bus stop without breakfast. He usually plays basketball after school. In

the evening, he seldom does homework. He goes to bed late. Xiao Yu is a lovely boy.

He gets up very slowly and then he usually takes a shower before breakfast. He goes to school in his father‟s car. He

五、词汇 根据句意和所给提示,填写正确的单词。

1. Kitty loves___________(dance). She practices it every day.

2. Jimmy wears ___________(glass). He looks cool.

3. The girl dances very (good).

(shop) with you?

5. He is good at ____________ (swim).

6. What colour ____________ (be) her new trousers?

7. Would you like ___________ (have) something to drink?

8. Lisa (go) to school with her sister every day

9. Let him (meet) my teacher, Mr. Wang.

10. I am __________(高兴的) to meet my new friend, Jim.

11. My mother is very (苗条) and beautiful.

12. ___________(每一个人) likes Mr. Zhou‟s English lessons.

13. My (梦想) is to be a good teacher in the future

14. The little girl looks very (讨人喜欢的).

15. Andy wants to join the Football ).

六、短文填词

David is eight. One day his friend Rose to him, "This Sunday is my birthday. Can you come to my es".

mother says, "Yes, you can go, but you food. They will give you some." "All right, Mum." David answers and he his bike.

for some time, and then Rose's mother gives them she forgets David. He waits and waits and then he takes his plate up and asks, "Do you want a plate?"

七、书面表达根据以下提示,以“My best friend ”为题,写一篇60 字左右的短文。

(1)我的好朋友Lucy,15岁, 来自美国,在7年级3班。

(2)个子高且苗条,黑色短发。 (3)爱好打排球。

(4)擅长游泳和绘画等;在学校有许多新朋友。 (5)老师和同学们都很喜爱她。

七年级英语寒假作业二

命题:张梦秋 审核:孙 飞

一、单项选择

( ) 1. --_______ do they go to see their teachers? --Every year.

A. How long B. When C. How often D. How much time

( ) 2. The boy, _______ his father, _______ fishing.

A. like; likes B. likes; likes C. likes; like D. like; like

( ) 3. He never_______ a hat even if (即使) it is in winter.

A. wears

A. and

A. OK B. be in C. in D. puts on ( ) 4. The bike is very old, _______ he likes it very much. B. but C. so C. no D. because D. really

D. /; /

D. about; to

D. are win ( ) 5. --Good news! We will have a party this Friday afternoon. --Oh, _______? B. all right ( )6. My friend Bob likes to play_______ football after_______ lunch. A. the; the B. /; the A. to; to C. the; / ( ) 7. --Who does Millie talk_______ animals_______?--Her classmates. B. about; about C. to; about B. wins C. can win ( ) 8. I hope you_______ the game. A. will to win

A. do ( ) 9. You are so busy. What do you want me_______ for you? B. does C. to do D. doing

( )10.--_______ the girls enjoy_______ this film?--Yes, they______.

A. Does; watching; does B. Do; watching; do C. Do; watch; do D. Does; watch; does

( )11. My father____

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