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数学上册第一单元检测试题及答案

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下面是小编为大家推荐的数学上册第一单元检测试题及答案,本文共8篇,欢迎阅读,希望大家能够喜欢。

篇1:数学上册第一单元检测试题及答案

一、仔细选一选:

1C2B3D4A5B

6C7A8D9A10B

二、仔细填一填:

11.下降8米

12.答案不唯一;

13.10;

14.,0.8;

15.±2,±3

16.1﹣1

17.<<

18.﹣1

19.0,零或正数,(非负数)

20.

三、全面答一答

21.(1)(①,⑦)

(2)(③,⑤)

(3)(②,⑥,⑨)

(4)(②,⑥,⑧,⑨)

22.解:0的相反数是0;﹣2.5的相反数是2.5;的相反数是﹣;(3分)

画数轴略(2分)

从大到小排列:,2.5,0,﹣2.5,﹣(3分)

23.(1)20,(2)3

24.①+15-25+20-40=-30(千米)答:在A地西30千米处

②15+25+20+40=100(千米)

因为这种汽车行驶100千米消耗的油量为8.9升,所以本次耗油为8.9升。

25.(1)①②③⑤⑥

(2)⑤

篇2:四年级数学上册第一单元检测试题

四年级数学上册第一单元检测试题(人教版)

一、填空:(15分)

1、每相邻的两个计算单位之间的进率是。这种计数方法叫()计数法。

2、一个数的省略万位后面的尾数是5万,这个数最大是(),最小是()。

3、一个六位数的最高位是()位,它的计算单位是()。

4、1843527省略百万位后面的尾数是(),省略万位后面的尾数是(),省略千位后面的尾数是()。

5、最小的自然数是(),()最大的`自然数,自然数的个数是()的。

6、位数多的数一定比位数少的数()。

7、从个位起,第()位是亿位。

8、由八千万和四十组成的数是()。

二、读出下面各数:(20分)

2596()

23850000()

6407000()

1985000300()

400305000000()

三、写出下面各数:(18分)

三百二十六万七千五百()

一百万()

四万零九十()

六万零一百二十三()

六十一亿()

二千零六十亿零九万()

四、用“万”作单位:(8分)

30=7580000=

0000=3070000=

五、用“亿”作单位:(8分)

46000000000000=987654000≈

1276270000≈20897000000≈

六、在括号里填上“﹥”“﹤”或“=”符号(8分)

53780()6250030300()30030

89500()101210756420()756542

七、找规律直接写出得数:(10分)

9÷9=1

108÷9=12

1107÷9=123

11106÷9=()

八、用3个7和3个0按要求写数。(只填一个数)

(9分)

1、写出一个零都不读的数()。

2、写出只读一个零的数是()。

3、写出读出两个零的数是()。

九、解决问题:(4分)

五个连续自然数的和是50,中间的那一个数是几?

篇3:四年级数学上册第一单元检测试题

四年级数学上册第一单元检测试题

一、判断题(每道小题 3分 共 9分 )

1. 五百二十万零九十写作:5002090 ( )

2. 40060500读作:四千零六万五百 ( )

3. 70000800读作:七亿零八百 ( )

二、单选题(每道小题 4分 共 16分 )

1. 40507080读作: [ ]

A.四千零五万零七千零八十

B.四千零五十万七千八十

C.四千零五十万七千零八十

2. 在下面的数中,最大的是: [ ]

最小的是: [ ]

A.504030 B.540030

C.450003 D.最小的六位数

3. 用5、0、9、3这四个数字组成的数中,

最小的是: [ ]

最大的是: [ ]

A.5093 B.9530 C.3059 D.3095

4. 把364800四舍五入到万位的近似数是 [ ]

A、4万 B、36万 C、37万 D、40万

三、填空题(第1小题 2分, 2-6每题 4分, 7-11每题 6分, 第12小题 7分, 第13小题 8分, 共 67分)

1. 从个位起,第五位是( )位,第九位是( )位.

2. 一个七位数最高位是5,千位上是8,其余各位都是0,这个数写作:( ),读作:( ).

3. 与1000000相邻的两个数是( ),( ).

4. 比较下面两数的大小.

(1)1250000□125万 (2)30万□300050

5. 比较两数的大小.

(1)9999000□99990000 (2)750001□75万

6. 比较两数的大小.

(1)807000□870000 (2)10200万□102000

7. 43509600这个数字里,“4”在( )位上,表示( );“5”在( )位上,表示( );“9”在( )位,表示( ).

8. 9354706000这个数,个级上的数字是( ),万级上的'数字是( ),亿级上的数字是( ).

9. 1亿里面有( )个千万,有( )个万,有( )个一.

10. 在□里填上适当的数.

(1)9□876≈9万 (2)9□876≈10万

11. 在□里填上适当的数

(1)7□6354≈72万 (2)3□2670≈37万

12. 在5300740这个数字中,( )位与( )位的0不读,因为这两个0在( ),所以读作:( ).

13. 875080是一个( )位数,最左边的8在( )位上,表示8个( ),另一个8在( )位上,它们的值相差( ).

四、应用题( 8分 )

商店卖出男鞋650双,卖出的女鞋是男鞋的2倍,商店共卖出男、女鞋多少双?

五、选作( 10分 )

用四个“9”,三个“0”,组成一个七位数写出

(1)三个“0”都不读出来的数是______________

(2)只读一个“0”的数是_______________

(3)读出两个“0”的数是_______________

(4)读出三个“0”的数是_______________

篇4:五年级上册数学第一单元检测试题

五年级上册数学第一单元检测试题

一、填空

1、比0大6的数记作+6,读作;比0小4的数记作(),记作()

2、零下6摄氏度记作(),-11℃表示()。

3、马尔代夫是一个岛国,平均高度仅比海平面高1米,其海拔高度记作();死海的海拔高度为-400米,表示()。

4、3.45是()位小数,在这个数中,3在()位,表示()个(),4在()位,表示()个(),5在()位,表示()个()。

5、由5个十和5个千分之一组成的'数是(),它的计数单位是()。

6、0.8里面有()个0.01;把3改写成计数单位是0.01的数是()。

7、23860006000读作(),省略亿后面的尾数约是()亿。

4994800=()万≈()万(精确到个位)

8、3893000000改写成用“亿”作单位的数是()亿,保留一位小数的近似数是()亿。

9、4□6666000≈4亿,□里一共能填()个数字。

10、用0、0、5、7和小数点组成的所有小数中,最大的数是(),最小的是()。

11、10平方米=()平方分米3600平方厘米=()平方分米

4角8分=()元5千克=()吨14毫米=()米0.3元=()角

篇5:三年级数学上册第一单元的检测试题

三年级数学上册第一单元的检测试题

一、口算(另卷,每题0.1分,共6分)

二、知识之窗(填空,每空0.5分,共15分)

1. 3厘米=( )毫米 ( )厘米=5分米

3厘米5毫米=( )毫米 6千米=( )米

100毫米=( )厘米 ( )米=4千米

40毫米=( )厘米 10千米=( )米

100毫米=( )分米 6千米300米=( )米

2. 1吨=( )千克 ( )千克=5000克

4吨=( )千克 9000千克=( )吨

()吨= 千克 3000克=( )千克

3.填上合适的单位。

一瓶酱油重1( ) 卡车载重8( )

三年级学生重30( ) 机场跑道长约3( )

桌子高85( ) 大头针长22( )

4. 明明绕学校操场跑两圈是400米,还差( )正好是1千米。

5.量数学课本的厚度,最好用( )作单位,量学校操场的长度,最好用( )作单位。

6.一张白纸约重3( ),一头大象约重2( ),一个西瓜约重4( )。

7.人们测量较小的长度时常用( )作单位,测量下面线段的长度

长( )

三.我会连(找出合适的单位用线连起来,每题2分,共8分)

一座桥长 15米

数学书厚 125厘米

小青的'身高 5千米

一幢楼房高 8毫米

四、谁是谁非(对的打√,错的打×。每题1分,共7分)

1.一枝铅笔长18米。 ( )

2.数学书宽约17厘米。 ( )

3.一座三层楼房高约10分米。 ( )

4.一辆长安小货车载重1吨。 ( )

5.新城小学到万江汽车总站约4千米。 ( )

6.一头猪重100千克。 ( )

7.一头成年蓝鲸重30千克。 ( )

五、我会画(每题2分,共6分)

1. 画一条长42毫米的线段。

2. 画一条长1分米2厘米的线段。

3. 画一条比7厘米短5毫米的线段。

六.计算(共28分)

1.计算。(每题2分,共20分)

6吨200千克=( )千克 1米—3分米=( )分米

7千米—5000米=( )米 8毫米 + 2毫米=( )厘米

82厘米—52厘米=( )分米 3厘米 + 2毫米=( )毫米

1吨—700千克=( )千克 6吨—2000千克=( )千克

5200千克—3200千克=( )吨 200千克+1800千克=( )吨

2.在( )里填上“=”、“”、“”。(每题1分,共8分)

2吨( )960千克 1000克( )3千克

45克( )3千克2050克( )2049千克

4千米( )4200米 100毫米( )1分米

15吨( )15千克 5000千克( )5吨

七、快乐ABC(在括号里填上正确答案的序号,每题2分,共10分))

1.最轻的是( )。

A.7000克 B.2吨 C.2千克

2.飞机每小时大约飞行800( )

A.米 B.分米 C.千米

3.2袋水泥重100( )

A.千克B.克C.吨

4.我步行1小时能走5( )

A.千米B.分米 C.厘米

5.1吨铁和1吨木材相比( )

A.铁重些B.木材重些 C.一样重

八、生活多彩园(解决问题,1、2题各6分,3题8分,共20分)

1.在一辆载重2吨的货车上,装有3个集装箱,每个集装箱重600千克,这辆车超载了吗?

2.菜店运来6吨大白菜,上午卖出3000千克,下午全部卖完。下午卖出大白菜多少千克?

3.从体育场到邮局,怎样走正好是1千米?(在图上把路线画出来,再计算。)

篇6:八年级英语上册第一单元检测试题及答案

I. 单项选择。

1. Which team _________ the game yesterday?

A. took B. wanted C. visited D. won

2. I went out and ________ in the river.

A. swim B. swam C. swimming D. to swim

3. The music sounds _______, I like it very much.

A. good B. well C. bad D. beautifully

4. I ________ late __________ class yesterday morning.

A. was,for B. was,to C. am,for D. am,to

5. What _______ he do on his last school trip?

A. does B. did C. is D. was

6. We _____ any sharks on my last school trip.

A. saw B. didn’t saw C. didn’t see D. see

7. — How many students are there in the classroom?

— __________. They are all on the playground.

A. No one B. None C. Nobody D. Everyone

8. The film “Kung Fu Panda” is _______ interesting _______ I would like to see it again.

A. such; that B. too; to C. as; as D. so; that

9. — When did you _______ table tennis?

— Three years ago. Later, I studied in Peking University.

A. stop to play B. stop playing C. start to play D. start play

10. The boy was born _______ the 3rd of July, 1989.

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

11. We didn’t go out to play _______ the bad weather.

A. because B. because of C. met D. of

12. She is ______ old to walk so long.

A. too B. so C. very D. such

13. Around the world, more and more people are _________ dangerous sports activities, because life in modern societies has become safe and boring.

A. taking out B. taking off C. taking part in D. taking care of

14. The musician wrote three _______ last year.

A. pieces of music B. pieces of musics C. piece of musics D. piece of music

15. She is famous _______ a violinist.

A. of B. for C. as D. in

[真题链接]

1. Look! Sonia looks worried. There must be ________ wrong with her.

A. nothing B

. something C. anything D. everything

2. -________ do you go to the supermarket, Amy?

-Once a week.

A. How many B. How much C. How far D. How often

3. -Have you heard the song Stay Here Forever?

-Yes. It sounds _______.

A. well B. loudly C. sweet D. beautifully

II. 完形填空。

I think the best place to go on Sunday is the zoo. When you are 1 , you can go there with your family. 2 the zoo, there are many animals: elephants, deer, 3 , rabbits and other animals. Elephants are the 4 animals on land. I 5 there is a baby elephant in our zoo. So I want to 6 at it. YuXuan wants to go with me. She says, “ 7 we go there together?” “Sure!” I say. “We can 8 a good time there. But let’s 9 there at half past four. I have 10 homework to do.”

1. A. busy B. free C. young D. clean

2. A. In B. On C. For D. Near

3. A. monkeys B. monkey

C. two monkey D. one monkeys

4. A. youngest B. smallest C. biggest D. tallest

5. A. listen B. listen to C. hear of D. hear

6. A. looks B. have a look C. see D. have a see

7. A. Can B. Could C. Shall D. Would

8. A. get B. have C. be D. has

9. A. goes B. go C. to go D. going

10. A. few B. little C. much D. many

III. 阅读理解。

A

I had a summer camp with my classmates last year.

Early in the morning, we gathered at the bus station. After saying goodbye to our parents, we got on the buses. It took us more than two hours to arrive at the campground.

We got off the buses cheerfully, laughing and shouting. We jumped and ran all over the place. It was the first time for us to be away from the parents. Some of us started to feel homesick(想家). However, when the night party and dances began, the homesick was gone.

The next day, everybody rushed to the boating class, hoping to be at the head of the others. At first, my friends and I worked hard, but the boat wouldn’t listen to us and kept going round and round. Then the teacher taught us how to work together. After many tries, we did much better.

Swimming class was my favorite. It was about the hottest time of a day and the best time to stay in the cool water. The swimming teacher was a funny man, and during the class he often made us laugh happily.

During the week I learned a lot and made many new friends. I also learned how to take care of myself.

1. They got to the campground _________.

A. on foot B. by bike C. by bus D. by plane

2. The campground was _________ from their homes.

A. quite near B. not far C. very long D. quite far

3. Why did the writer like swimming class best?

A. Because it was good to stay in the cool water on hot weather.

B. Because the writer felt quite relaxed during the class.

C. Because the swimming teacher was interesting.

D. Because of all the above.

4. Which statement is NOT true?

A. The children were happy to be away from their parents.

B. Their homesickness lasted for long.

C. It was teamwork to boat.

D. They camped for a week.

5. Which is the best title for the passage?

A. I Learned a lot

B. Boating and Swimming

C. On the Campground

D. My First Summer Camp

B

Stephen Hawking was born in Oxford, England on the eighth of January, 1942. He went to school in ST Albans— a small city near London. After leaving school, Mr. Hawking went to Oxford University where he studied physics, then he went to Cambridge University.

When he was 20 years old, Mr. Hawking got a bad illness. He couldn’t speak or move without the help of a machine. Doctors said they had no way to help him. He would die before he was 23. At first, Mr. Hawking became very sad. After a while, though, he began to see his life in a different way. He worked hard and later became a very famous professor. Today he still works at Cambridge University as a professor.

6. When was Mr. Hawking born?

_______________________________________________________

7. How many universities did Mr. Hawking study in?

_______________________________________________________

8. Which year did Mr. Hawking get a bad illness?

_______________________________________________________

9. Did Mr. Hawking go to school in London?

_______________________________________________________

10. Where does Mr. Hawking still work today?

C

There are several ways you can find out about the countries and places you wish to visit. You can talk to friends who have traveled to the places, you can go and see a color film about them, or you can read a travel book.

It seems that there are three kinds of travel books. The first are those that give a personal, subjective(主观的) idea of travels which their writer has got himself. These books can be useful if the writers share their traveling experiences with others. The second kind are those books which give objective(客观的) information of things to be done and seen. If a cultured person has written such a book about the facts of a place, then it is more useful. The third kind are those books which are called “a guide” to some place or other. If they are good, they will describe and explain the place in detail. Like the first kind , they can be interesting and exciting, but their main purpose is to help the reader plan his travel in the most practical way.

Whatever kind of travel book you choose, you must make sure that the book does not describe everything as interesting, exciting or fantastic. You must also keep an open eyes on its date of publication(出版) because travel is very practical matter and many things change quickly in the 21st century. Finally, you should make sure that it’s easy to find the useful information for you travel.

11. The passage was written to introduce_______.

A. travel maps B. travel books C. travel films D. travel places

12. The writer of the first kind of travel books gave his ideas after he _______.

A. traveled B. read books C. a lot of experience D. surfed the Internet

13. The underlined phrase “a cultured person” means a person with ________.

A. a good appearance B. a good education

C. a lot of experience D. a lot of money

14. The date of publication must be noticed because ________.

A. the prices of travel books may be different

B. the writers of travel books may be different

C. the information in travel books is always the same

D. the information in travel books is always changing

15. According to the passage, it is best to read ______ before traveling to a place of interest.

A. the first kind of travel books B. the second kind of travel books

C. the third kind of travel books D. some travel articles in newspaper

IV. 书面表达。

请根据要求写一篇日记。上个休息日(4月24日,星期日,天气晴朗),我过得非常有趣。

上午:去中心动物园,看到一些海豹,一些鲨鱼和海豚表演,然后和朋友一起去打篮球,游泳。

中午:在肯德基吃午饭 (汉堡包,可乐,水果冰淇淋等)。

下午:去新华书店看书,买了一些礼物。到中山公园游玩并照相。

字数:60-80词

______________________________________________________

______________________________________________________

______________________________________________________

______________________________________________________

答案与解析:

I. 单项选择。

1. D。由时间状语yesterday可知应填一般过去时。won the game意为“赢得比赛”。

2. B。and连接的两个动词形式要一致。故都用一般过去时。

3. A。sound为系动词,后接形容词。

4. A。由yesterday morning可知填一般过去时。be late for 迟到。

5. B。由on his last school trip可知是一般过去时。

6. C。由on my last school trip可知是一般过去时,又因为any sharks故用否定句,didn’t 后加动词原形。

7. B。根据句意“— 教室里有多少学生?— 没有,他们都在操场上。”no one相当于nobody,回答who的提问,而none则回答how many / how much的提问。

8. D。根据句意“《功夫熊猫》这部电影是如此的有趣以至于我想再看一遍”可知应该选表示“如此……以至于”的短语,第一空后为形容词,所以应该用so;第二空后是句子,空中应该填that,所以答案为D。

9. B。stop doing sth. 意为“停止做某事”;stop to do sth.意为“停下来去做某事”;start to do sth.意为“开始做某事”。根据答语“后来,我在北京大学学习”可知问句问的是“你什么时候停止打兵乓球的?”所以答案为B。

10. B。具体到某一天用介词on。

11. B。because +句子;because of+短语或名词。

12. A。too...to... 太……而不能。固定用法。

13. C。短语意义辨析。“参加某项活动”用词组take part in 表达。其它短语意义与句意不符。

14. A。音乐是不可数名词,量词应该用piece,三首曲子表达为“three pieces of music”。

15. C。be famous as意为“作为……而出名”。句意为:她作为一名小提琴家而闻名。

[真题链接]

1. B。本题意为:——看!Sonia看起来很担心;她一定是出了什么问题。因为本题表示猜测,所以用something;有肯定的意思,即可能有问题了,如果换用anything或者everything表示完全肯定;所以答案B最合适。

2. D。句意:——你多久去一次超市。Amy?——一周一次。how many 和how much 均可表示“多少”;how many 修饰可数名词的复数形式,而how much 修饰不可数名词,还可以用来询问价格。how far “多远”一般指的是一地到另一地的距离;how often“多长时间一次”对在某一特定的时间内进行的动作次数进行提问,故答案选D。

3. C。本题意为:—你听过《永远待在这里》这首歌吗?—是的,听起来非常甜美。本题考查sound的用法;sound+形容词,表示听起来……;故答案选C。

II. 完形填空。

1. B。由the best place to go on Sunday is the zoo可知应是有空的时候。

2. A。在动物园里用介词in。

3. A。monkey是可数名词,单数前用a,复数加s。

4. C。大象应是最大的动物。故填biggest。

5. D。hear听说,后可以接宾语从句。

6. B。have a look at 看一看,固定短语。

7. C。Shall we...?表示一种建议。

8. B。have a good time 玩得高兴,固定短语。

9. B。let’s后接动词原形。

10. C。homework为不可数名词。

III. 阅读理解。

A

1. C。根据原文“…we got on the buses.”可知答案。

2. D。根据原文“It took us more than two hours to arrive at the campground.”可知答案。

3. D。根据原文倒数第二段内容可知答案。

4. B。根据原文第三段倒数第一、二段话可知答案。

5. D。根据全文意思可知答案。

B

6. He was born on the eighth of January, 1942.

7. He studied in two universities.

8. In 1962.

9. No, he didn’t.

10. At Cambridge University.

C

11. B。结合全文来看,本文主要向我们介绍了关于旅游的书,故答案选B。

12. A。由第二段的第三句话“These books can be useful if the writers share their traveling experiences with others.”作者和其他人分享了他们的旅行经验,可知答案选A,第一本书是作者在他已经旅行过后,给出的自己的看法。

13. B。本题考查词语的近义词的转换,a cultured person有文化的人, a good appearance好看的外表;a good education良好的教育;a lot of experience很多经验;a lot of money很多钱,故答案选B。a person with a good education受过良好教育的人。

14. D。由最后一段的倒数第二句话“You must also keep an open eyes on its date of publication(出版) because travel is very practical matter and many things change quickly in the 21st century.”可知出版的日期要注意,因为在21世纪的今天,很多事情的变化很快,故答案选D。

15. C。由第二段的倒数第三句话“The third kind are those books which are called “a guide” to some place or other” 可知答案选C。

IV. 书面表达。

April 24th Sunday Sunny

Last day off, I had a great time. In the morning, I got up very early. After eating breakfast, I went to Center zoo and saw some seals, sharks and dolphin’s show. I bought some souvenirs. Then I went out playing basketball with my good friend Jim for one hour, and then we swam at the pool. We had some hamburgers and coke for lunch at KFC. We also had some fruit ice-cream. We had a rest for one and a half hours, then we went to Xinhua bookshop and read some books. We went to Zhongshan Park, we bought some gifts, and the park is very beautiful. We took lots of photos there. We enjoyed ourselves very much.

篇7:五年级数学上册第一单元试题及答案

苏教版五年级数学上册第一单元试题及答案

一、填空题。

1.在5、-2、1.9、+6、-40、-12、0中正数有( ),负数有( ),( )既不是正数也不是负数。

2.如果某蓄水池的标准水位记作0米,用正数表示水面高于标准水位的高度,那么低于标准水位0.4米,应该表示为( )米。

3.某天甲市的最高气温是25℃,记作+25℃,乙市的最低气温是零下5℃,可以记作( )℃。

4.一袋大米的标准质量是50千克,如果比标准质量少0.3千克,记作-0.3千克,那么比标准质量少2千克,记作( )千克。

5.一瓶饮料的外包装上标有“净含量500±5克”,表示这瓶饮料的'质量在( )~( )克之间。

6.如果客车前进100米用+100米来表示,那么客车倒退10米用( )米来表示。如果上来10人用+10人来表示,那么下去6人用( )人来表示。

二、判断题。(正确的画“”,错误的画“”)

1.0既不是正数,也不是负数。( )

2.2℃和-2℃所表示的温度相同。( )

3.-3和+4相比,+4更接近0。( )

4.正数一定大于0,负数一定小于0。( )

三、在○里填上“>”“<”或“=”。

2.8×0.9○2.8 3.5×1.01○3.5

7.1×1○7.137×0.99○0.99

四、给下面的得数补上小数点,使等式成立。

4.8×0.13=624 2.7×1.5=405

0.125×8=10005.36×3.9=20904

2.5×40=10004.5×1.28=5760

五、计算题。

1.直接写得数。

0.5×0.2= 4×0.15= 50×0.4=

8×0.125=0.23×10=0.12×7=

2.用竖式计算。(带※的保留两位小数)

※3.52×0.05≈ ※120.44×0.2≈

8.25×1.4=8.76×3.5=

4.25×0.4=2.7×1.6=

3.用简便方法计算。

50.4×1.2-1.2×0.4 0.25×3.3×0.4

3.2×4.4+4.4×6.8 1.25×16

六、帮收款员把下面两张购物小票填写完整。

振华量贩购物单

品名 单价 数量

食盐 1.59元 3

小计:( )元

付款:10.00元

找零:( )元 万佳购物欢迎你

品名 单价 数量

巧克力 7.8元 6

小计:( )元

付款:50.00元

找零:( )元

七、解决问题。

1.人的嗅觉细胞约有0.049亿个,狗的嗅觉细胞的个数是人的45倍,狗约有多少亿个嗅觉细胞?(得数保留一位小数)

2.一幢大楼有24层,每层高2.84米,这幢大楼高多少米?

3.布店有一种布料,每米售价12.5元,买2.58米这样的布料,应付多少元?

4.妈妈去超市购物,大米每千克3.96元,买了5千克。带鱼每千克7.92元,买了5.02千克,买这些东西共需要多少钱?

5.汽车的油箱里有25升汽油,每升汽油可以供汽车行驶12.5千米,汽车中途需要加油吗?

参考答案

一、1.4个3.2的和是多少 12.8

2.302 5 1510 3 3 1.51

3.4 4.2.546 25460

5.4.54 4.45

二、1. 2. 3. 4. 5.

三、< >= >

四、0.624 4.05 1.000 20.904 100.0 5.760

五、1.0.1 0.6 20 1 2.3 0.84

2.0.18 24.09 11.55 30.66 1.7 4.32

3.60 0.33 44 20

六、4.77 5.23 46.8 3.2

七、1.0.049×45≈2.2(亿个)

2.24×2.84=68.16(米)

3.12.5×2.58=32.25(元)

4.3.96×5+7.92×5.02=59.5584(元)≈59.56(元)

5.12.5×25=312.5(千米)

312.5千米>300千米 不需要加油。

篇8:五年级上册数学的第一单元试题及答案

关于五年级上册数学的第一单元试题及答案

一、填空

1.王阿姨的计算器坏了,显示屏上显示不出小数点,你能很快地帮她写出下面各式的结果吗?

已知:148×23=3404,

那么:1.48×23=(),148×2.3=(),0.148×23=(),

14.8×2.3=(),1.48×0.23=(),0.148×0.23=()。

考查目的:考查学生根据因数与积的小数位数的关系,正确确定积的小数点的位置。

答案:34.04340.43.40434.040.34040.03404

解析:这六道小数乘法的.计算方法是相同的,就是积的小数点位置不同。它们都是先按照整数乘法“148×23”算出积,再根据小数乘法中因数与积的小数位数之间的关系,在积“3404”中确定小数点的位置。确定小数点的位置时,一定要数清两个因数一共有几位小数,再从积的右边起数出几位,点上小数点。本题既考查了学生对小数乘法计算方法掌握的情况,又让学生感受到小数乘法与整数乘法之间的内在联系。

2.在○里填上“>”“<”或“=”。

7.3×1.2○7.34.9×0.65○4.95.43×1○5.432.8×0.86○2.95

考查目的:考查学生因数与积的大小关系掌握情况。

答案:><=<

解析:这四道小题都要根据积和因数的大小关系进行比较。第一小题是7.3乘大于1的数,乘得的积比7.3大,所以应该填“>”;第二小题是4.9乘小于1的数,乘得的积比4.9小,所以应该填“<”;第三小题是5.43乘等于1的数,乘得的积就是5.43,所以应该填“=”;第四小题是2.8乘小于1的数,乘得的积比2.8小,既然比2.8小,那就更比2.95小,所以应该填“<”。

3.根据运算定律在方框里填上合适的数。

(1)2.5×(0.77×0.4)=(×)×

(2)6.1×3.6+3.9×3.6=(+)×

(3)2.02×8.5=×8.5+×8.5

(4)48×0.25=0.25××

考查目的:考查学生对乘法运算定律的掌握情况,以及是否能根据乘法运算定律对算式进行适当的变换。

答案:(1)(2.5×0.4)×0.77

(2)(6.1+3.9)×3.6

(3)2×8.5+0.02×8.5

(4)0.25×4×12

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