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四年级下册暑假作业答案

时间：2022-07-01 18:19:14 求职我要投稿

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四年级下册暑假作业答案

四年级数学暑假作业答案：一

1、34平方分米;84分;0.02吨

2、300÷6×300=15000千克=15吨

3、每公顷需要4÷5=0.8小时;每小时耕5÷4=1.25公顷

4、27222÷6981500×【(752+225)÷2】

5、36÷【100÷(12-8)-13】

6、40

7、420+(420+12)÷4

8、(1131-5×75)÷75

9、31.5÷18-31.5÷20

10、6÷3÷4算出每台每小时耕0.5公顷，0.5×5×6=15

11、连环画看做1份，故事书是2份还多5本，两种书一共的245本就是3份还多5本，所以245-5=240，连环画240÷3=80本，故事书80×2+5=165本

12、乙是甲的10倍，丙是乙的10倍也就是甲的100倍，甲：.653÷(100+10+1)=0.123

13、13×6=7890÷2=45

14、11个，21条

15、28+44=72

16、8

17、1522.6

18、第六天白天一下就爬了110米，就没有滑下来;前五天每天爬110-40=70米，所以70×5+110=460米

19、90.05(不包括);最小应大于89.94(不包括)

20、如果被除数968加上35就刚好被这个数整除，商就是17，所以这个数(968+35)÷17

二、计算

(1)25600(2)386.6(3)7.5(4)11100

(5)三个数一组，每组分别是0、3、6、9…27，和一共是135

1、运用倒推还原(8.6-1.7×3)÷5，当然也可以设这个数为X，列方程解答。

2、129减去余数3，再减去商3得123，就是被除数和除数的和，被除数是除数的3倍多3，所以123-3=120就是除数的4倍，120除以4就是除数等于30，所以被除数是93.

3、(39-3)÷3=12岁，39-12=27岁，老师27岁

4、相差12

5、先算油的重量：(86-53)×2=66千克。所以桶重20千克

6、6位一循环，2007÷6=334……3，第三个是5

7、70.25小时，0.075千克;0.34平方米

8、(18-3)×0.6+13.5

9、倒推，(40+30)×2=140，(140+20)×2=320，(320+10)×2=660

10、2160÷30=72台，72+18=90台，2160÷90=24天，30-24=6天，提前6天

11、(m-n)÷5

12、苹果每千克(3.2+1.4)÷2=2.3元，一共带了2.3×3+1.4=8.3元

13、考虑除数应该比余数大，24-3=21，所以除数可以为7和21，商就有两个答案

14、相加就是这个数的2倍，相减是0，相除是1，所以101-1=100就是这个数的2倍，这个数是50

15、甲数的小数点向右移动一位就是扩大10倍，才等于乙数一半，所以乙数就是加数的20倍，63÷(20+1)=3，所以甲数是3

16、距离中点150米相遇，就说明走得快的甲比比走得慢的乙就多走了两个150米，就是多300米，甲的速度是乙的1.4倍，那么他走得路程也是乙的1.4倍，接着就是差倍问题了，300÷(1。4-1)=750米，(750+150)×2=1800米

17、5×5×4×3=300

18、12.21，如果这个题没做对，该好好修理一下。

19、第一把钥匙去开，运气太差了，连试4次都不行，就一定是最后一把锁的钥匙了。第二把运气差就要试3次，以此类推，所以4+3+2+1=10次

20、0-99有20个2，100-199有20个2，200-300有120个2，共160个2

21、长和宽相差2，周长20除以2就是长和宽的和，和差问题，长：(10+2)÷2=6，宽就为4

22、有点难，要做辅助线，要补成一个大长方形ABCD,答案就等于15乘8

计算

(1)71.5(2)1÷2×3÷3×4÷4×5……÷19×20=10

(3)略

(4)111100

(5)37-3.7=33.3

(6)自己算

四年级英语下册暑假作业答案二：

练习一

Ⅰ. 1. untidy 2. stamp 3. interview 4. least 5. fan

Ⅱ. 1. collections 2. invited 3. did, start 4. has gone 5.came

6. did , buy, have,had 7. have left, don’t forget

Ⅲ. 1~5 BBBBC 6~10 ADACC

Ⅳ. 1. will look after 2. like doing 3. To develop 4.great success

5. such as

Ⅴ. 1. My favourite 2. How many 3. to do 4. When 5. Why do

练习二

Ⅰ. 1. She is afraid to walk in the dark. 2. Are you afraid of snakes ?

3. Could you tell me how old Tom is ?

4. By the way , why don’t you look up the word in the dictionary ?

5. I have heard that there is going to be a class meeting on Friday.

Ⅱ. 1~5 CADBD 6~10 AADAB

Ⅲ. 1.when the train leaves 2. if, wanted 3. if/ whether, was

4. don’t, not 5. Be, or

Ⅳ. 1~5 BADBB 6~10 CCDBC

练习三

Ⅰ. 1. make friends 2. day by day 3. at first 4. far away

5. at that moment 6. in a few weeks 7. worry about 8. as a result

9. smile at… 10. a couple of

Ⅱ. 1. take up 2. spends, practicing 3. At first 4. to do

5. I hope you can have a good time at the party.

Ⅲ. 1~5 FBGED

Ⅳ. 1. cut down 2. in danger 3. fresh 4. save 5. important

6. protect 7. waste 8. throw 9. plant 10. beautiful

Ⅴ. 1. It seems 2. 作者; writer

3. You should tell your parents what you need 4. BCA 5. C

练习二十一

I. 1. interesting 2. bored 3. cool 4. tiring 5. interested

II. 1~5 AABAA 6~10 BAADD

III. 1. had a good time 2. rode a camel 3. fantastic 4. a lot of

5. imagine 6. lonely 7. boring 8. travel 9. by ship

10. make up my mind 11. swimming 12. skiing 13. interesting

14. although 15. happy

IV. 1. trip 2. famous 3.with 4. when 5.excited 6.visited

7. taking 8. spent 9. but 10. asleep

练习二十二

I. 1~5 CBAAA 6~7 AB

II. 1. 送行 2. go to college 3. 由…制成 4. agree with sb.

5. 穿衣服 6. fall asleep 7. 叫醒 8. depend on

III. 1. I would go to China to eat dumplings.

2. I would go to South Africa to buy some gold.

3. I would go to Australia to see koala bears.

4. I would go to Japan to climb Mount Fuji.

IV. 1~3 DBA

练习二十三

I. 1~5 CABAB 6~10 AACBA

II. 1. bad 2. dirty 3. useless 4. wet

III. 1. football 2. Victoria Adams 3. his children

4. My side is the story of his football career for Manchester United and England, and of his childhood, family and personal life.

5. He learned so fast that he was able to go around and give concerts when he was only 11.

练习二十四

I. 1. he was ill, so he didn’t come to the meeting .

2. Because they learned new skills, they won the game.

3.She spoke in a low voice so that no one could hear.

4. I wouldn’t mind going by train but I don’t like to sit on a hard seat for long hours.

5. Although Giraffes are tall, they are very gentle animals.

6. He always has some smart ideas when we ask him.

7. I worked in that factory for five years before I came to this factory.

8. We kept on dancing and singing until they all joined us.

9. I am playing football while my brother is writing a letter.

10. I will come to your place as soon as you ask me.

II. 1~5 BACBD

III. The Spring Festival is the most important festival for the Chinese. It falls on

the first day of the first month in the Chinese lunar calendar. On the eve of

the Spring Festival the Chinese have a family feast. After that they stay up till midnight to welcome the Spring Festival with firecrackers. On New Year’s Day, people visit their relatives and friends to exchange New Year’s greetings. Children receive a lot of gift money.

P3近似数普通写成用千、万、百万、千万、亿为单位的数

P5一格自然数的近似数是5亿，这个数最大能够是549999999，最小能够是450000000

P9麦子放到第28格，这一格曾经超越1亿粒;第64格大约要放92233720368亿粒

P11判别，3和4是错的，其他都对。

p15角的度数：角4=60度，角5=72度，角6=36度

P19画一画，留意画垂线，标上直角符号

P20认一认，梯形有5和6，轴对称图形是1、3、4、5

P23填一填360平方米=0.036公顷

收款收据：大写：叁仟八佰陆拾伍元零角零分

P24选择(3)选9个

P31想一想(1)选A、B

P43火柴算式：23x4=9228x11=30817x14=238