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七年级寒假作业答案

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2016年人教版七年级寒假作业答案

以下是小编为大家收集整理的2016年人教版七年级寒假作业参考答案，欢迎参考，切勿盲目照抄哦。

数学

1、 =-0.5 =2

2、略

3、略

4、-1.50062×10^4

5、-0.00203

6、-1/(1+2a) -3/(2ab 2(x-y)

7、<-2.5

8、扩大5倍

选择题 ABC

12、 (1)=b/(a+b) (2)=3/(x-1) (3)=【(x-y)2/xy】×【xy/(x+y)2】 = (x 2-2xy+y 2)/(x 2+2xy+y 2) (4)=(32x^7)/(9 y^3)

13、 x-12=2x+1 x=1

14、(1) x带入原式= (-2/5 2k)/-6/5k = 8/5 k=-5

(2)原式=x 2/(x 2+x) 当x=-1/2时，原式=-1

15、原式的倒数=3(x 2+1/x 2-1)=-9/4

16、原式=(a+ab+abc)÷(a+ab+abc)=1

17、设小李x，小王x+2。 60/(x+2)=48/x x=8 x+2=10

1、(1)右 4 下 5 下 5 右 4 点A′ 点B′ ∠C′ 线段B′C′

(2)相同距离

(3)相等相等相等

(4)形状

(5)距离

(6)略

2、图自己画啊

(1)一个定点这个定点

(2) 旋转中心相等相等相等

(3)大小形状

(4)略

3、图自己画

(1)180° 另一个图形两个图形这点两个图形成中心对称对称中心交点

(2)初始旋转中心旋转角 0°<α<360°

(3)180° 初始图形对称中心

(4)略

4、图自己画

(1)成轴对称直线

(2)相等相等相同不变

(3)两对对应点中点的垂线

(4)相互重合轴对称图形直线

(5)过圆心的直线无数边中点的中垂线 3 4 2

(6)略

5、 C 90° 点A 点E 线段CA 线段CE ∠A AC中点Q上等腰直角

1、画图全都自己画吧

2、画图略 (2)顺时针旋转119°或逆时针旋转241°

3、画图略 (1) 平移 AB与A′B′，AC与A′C′，BC与B′C′

(2)逆时针旋转90° 90 90

(3)绕点O逆时针(顺时针)旋转180° (点O自己在图上标出)

1、平移旋转翻折

2、位置形状、大小

3、 90°

4、圆心

5、 8

6、是是

7、 H I O X

8、平移旋转翻折大小形状

9、 C

10、 D

11、 C

12、画图略

13、画图略

14、画图略

15、画图略

16、画图略

17、点C、点B、线段BC中点

18、设EC为x cm。 8∶5=x∶4 x=6.04

1、2a^7 (y 2x 2)/x 2y 2

2、3/2m 2x -2/(x+3)

3、xy(y-x) (x+1)(x-1)(x+3)(x-3)

4、(-3y 3)/x 2z

5、6

6、等边三角形

7、169/4 π

选择题 CB

10、(1)=2a/(a-b) (2)=1/a2b 2

11、x=-1 x=5/4

12、画图略 S阴=8×10.04/2-5×6.04/2=25.06 cm 2

13、画图略

14、原式=2/(x+1)2 当……时，原式=8

15、 A-B=2 3A-2B=1 A=-3 B=-5

16、设有x克 x/(235+x)=6 % x=15

17、画图略

18、书上有

新学期预习实数

1、 a<4

2、 9 ±9

3、 0

4、 3-√7

5、 -0.5

6、 ±a

7、 ≥1

8、略

9、 2 实偶次 1 正数 1 负

10、 3 162277660加上循环点选择题 BCAC

15、 11

16、 (1)x=±30 (2)x-1=±0.25 x=5/4

17、 a=1.5 m=a2=9/4

18、 4-2x≥0

英语

英语练习一

worry about

be divided into

worry too much

keep secrets

fargue with sb.

forgive sb. for sth.

show off

give up easily

take care of

pay attention to

different kinds of ideas

devote to charity

modest generous

unlucky shy

hard-working inpatient

impossible unfair

inactive full

dishonest incorrect

weak stupid

to save

not meeting

to eat

explaining

putting

butterfiles

planning

unfair

leader

energetic

What is he like

What does Sam often dream about

Which women is our new teacher

The were divided into 4 groups by Mr zhang

His young sister is taken care of by Peter

Your star sign is divided by your birthday

His mother is so kind that shi helps others

There is nothing wrong with Jim's mind

He is clever enough to solve the problem

Can you tell me how to get to the nearest shop

AAABB ADBAD AC

CBCDA DABCD

CACCCAB

作文略

P41页

一 helicopter abacus ferry ambulance handcuffs purse cycling trainer astronaut

二 one hundred and fifty-eight

two thousand and one

fourty-five percent

zero point twenty-five

six point zero three

sixty degree

six point fifty-nine

one thousand five hundred and seventy-one

one/sixth

three/fifth

P43页

一 play football wash his face play the violin make phone calls to sb. arguing fishing

二 (1)1,000、120、852 (2)15、79、17、27、2,005 (3) 3/10、3/5、3/7、7/9 (4) 50%、75% (5)25°、160°

(5)0.78、11.45、21.13、57.22、6.5

P44页

(1)Sun is the only star in our salar system.

(2) It gives us heat and light.

(3) The moon is just 380,000 kilometers away.

(4) It looks much smaller because it is very for away.

(5) It takes four years for light to reach us from Alpha Centauri.

P45页

二自己填，因为是按自己实际情况回答的问题

P51-53

1、The boy went to the recepttion.

2、The boy is at the recepttion .

3 The boy is far from the recepttion.

4、The cat jumped onto the table.

5、The cat on the table

6、The cat fall off the table.

7、It is above the car.

8、It is below the car.

9、The boy is in front of the car.

10、The boy is behind the car.

11、The policeman is behind two cars.

12、The boy walks into the house.

13、The girl is in the house.

14、 The boy walks out of the house .

The most important qualities：helpful,friendly,kind

Reasons:I think make friends should care about each other,help each other.

Feb 1: to clean up the house and prepare for reunion dinner;

Feb 1 till mid night: to dine till 2359 hours for the new year;

Feb 2: get lucky money

Feb 2: to pay our senior member of the family visit and wish them a very prosperous new year;

Feb 3: To visit our relatives and friend for new year;

P54

走进大门的右侧是问讯处(formation desk)。鹦鹉馆紧挨着问讯处。如果需要饮料或想吃点东西，小吃部(cafeteria)就在鹦鹉馆的后面，所以有些嘈杂。狮虎山与鹦鹉馆相对，狮子在前，老虎在后。斑马在进大门左侧的第一个房子里。大象房正对着大门，而猴山则在挨着大象房的左角侧。袋鼠馆则在鹦鹉馆过去，紧挨着大象房的右角侧。最后，熊山在左侧的狮虎山和猴山之间。

P47页

was/were cooked knew swam got taught leaved felt smelt drove ran thought kept bought began did

cost found throught stood spake came gave heard sold hurt saw steal took slept sit met brought flew

woke chose lost read rose wore

P48页

(1) Wat's your favourite sports?

(2) A man steal a purse from a tourist.

(3) They did cought the thief.

(4) Our class consist of 40 students.

(5) I aim the torch at his eye.

P49 (横着写)

1、 I attend school everyday. I attended church yesterday.

I will be attending a concert tomorrow.

I have to explain why I am late everyday.

I explained the question to her two days ago.

I will be explaining the details next week.

The thief steals everyday.

He stole the wallet last Sunday.

They will be stealing the painting tomorrow.

She likes to invite people to her house everday.

She invited me to her party yesterday.

She will be inviting me to her party tomorrow.

2、 $75 $60 $15

P51-53

1、The boy went to the recepttion.

2、The boy is at the recepttion .

3 The boy is far from the recepttion.

4、The cat jumped onto the table.

5、The cat on the table

6、The cat fall off the table.

7、It is above the car.

8、It is below the car.

9、The boy is in front of the car.

10、The boy is behind the car.

11、The policeman is behind two cars.

12、The boy walks into the house.

13、The girl is in the house.

14、 The boy walks out of the house .

The most important qualities：helpful,friendly,kind

Reasons:I think make friends should care about each other,help each other.

Feb 1: to clean up the house and prepare for reunion dinner;

Feb 1 till mid night: to dine till 2359 hours for the new year;

Feb 2: get lucky money

Feb 2: to pay our senior member of the family visit and wish them a very prosperous new year;

Feb 3: To visit our relatives and friend for new year;

P54

P55

I always take a shower.

I do the homework very often

I often play football

sometimes I watch the TV

I never go shopping

I don't often go to bed early o sometimes I go to bed early

1/The largest mammals in the world.

2/weight

3/White Rhinoceeros

4/100 feet long

5/8000 pounds

6/White Rhinoceeros

In new year,my family want to travel，but every one have different ideas. so i look for many books,and i want go to beijin,because i think there is our capital city,i like the Great Wall and the imperial palace.and some food tastes delicious every year,a lot of visitors come to there. I think we have a good travel.

1、The boy went to the recepttion.

2、The boy is at the recepttion .

3 The boy is far from the recepttion.

4、The cat jumped onto the table.

5、The cat on the table

6、The cat fall off the table.

7、It is above the car.

8、It is below the car.

9、The boy is in front of the car.

10、The boy is behind the car.

11、The policeman is behind two cars.

12、The boy walks into the house.