思维训练100题

思维训练100题
思维训练100题

英语思维训练100题

1. (1) Tom got the first place, ______ made his parents happy.

(2) Tom got the first place, and _______ made his parents happy.

A. as

B. which

C. what

D. this

2.(1) _______ is well known to all, the earth is round.

(2) _______ is well known to all that the earth is round.

A. That

B. with

C. It

D. As

3.(1) It’s good _______ you to take a walk after supper every day.

(2) It was really stupid _______ him to refuse the invitation.

A. of

B. to

C. for

D. at

4.(1) He is unfit for the job, ________?

(2) He isn’t fit for the job, ________?

A. isn’t he

B. is he

C. doesn’t he

D. does he

5.(1) Is this museum _______ you visited the other day?

(2) Is this the museum _______ you visited the other day?

A. that

B. where

C. in which

D. the one

6.(1) He said that Mary had done it, ________?

A. hadn’t she

B. hadn’t Mary

C. didn’t he

D. did he

(2) It’s my son’s birthday next week, and I have to do my best for that, ____?

A. isn’t it

B. is it

C. haven’t I

D. don’t I

7.(1)— I watched TV last night. —_________.

A. So I did

B. So did I

C. So I was

D. So was I

(2) Mr. Chen is a teacher and works very hard. _______ his wife.

A. So does

B. So is

C. So it is with

D. It is same with

8.(1) It is 10 years since we _______ school.

A. left

B. have left

C. had left

D. leave

(2) This is the first time I _______ here.

A. was

B. am going

C. have been

D. came

9.(1) Let’s start at once, _______?

(2) Let us go, _________?

A. will you

B. shall we

C. do you

D. do we

10.(1) There are many trees on _______ side of the street.

(2) There are many students watching the volleyball match on _______ side

of the playground.

A. all

B. both

C. every

D. each

11.(1) Mr. Johnson must have come back yesterday, _______?

(2) He must have waited here for a long time, _______?

A. h asn’t he

B. haven’t he

C. mustn’t he

D. didn’t he

12.(1) ________ knows the truth will tell you about it, I think.

A. Who

B. That

C. No matter who

D. Whoever

(2) Don’t trust him, ______ he says.

A. what

B. no matter what

C. whatever

D. B and C

13.(1) —“_______ can the work be done?” —In five hours.

(2) —______ have you studied English? —For six years.

A. How long

B. How soon

C. How often

D. How far

14.(1) Zhang Ming is taller than ______ in his class.

A. any students

B. anyone

C. any other student

D. others

(2) He studies English harder than _______ in his class.

A. any students

B. any boys

C. anyone

D. any girls

15.(1 )Shall we have her _______ there?

(2) Shall we get her ________ there?

A. to go

B. go

C. went

D. gone

16.(1) —The experiment has failed. — I suggest you _______ again.

A. to try

B. will try

C. would try

D. try

(2) Her expression suggested that she _______ angry.

A. be

B. was

C. were

D. being

17.(1) They usually have a Party meeting on Saturday afternoon, _______?

A. don’t they

B. haven’t they

C. do they

D. have they

(2) He hasn’t any brothers, ______?

A. has he

B. does he

C. hasn’t he

D. A and B

18.(1) Waiting for her _______ me three hours.

(2) We’ll ________ three days in doing the work.

A. took

B. cost

C. pay

D. spend

19.(1) He wanted nothing but _______ there.

A. stayed

B. staying

C. to stay

D. stay

(2) He would do anything for you but ______ you money.

A. lend

B. to lend

C. lent

D. lending

20.(1) He told his mother that he couldn’t ______ the kitchen.

(2) When he saw his mother busy cooking, he couldn’t ______ th e kitchen.

A. help clean

B. help cleaning

C. help cleaned

D. helping to clean

21.(1) I managed to make myself ________.

A. hear

B. heard

C. to be heard

D. hearing

(2) The earth must be made ______ more people.

A. supported

B. supporting

C. to support

D. support

22.(1) _____ care for others will be respected.

A. That

B. These

C. Those who

D. Who

(2) ______ fails to finish the task given should be criticized.

A. Any one who

B. Anyone who

C. Anyone which

D. Any one

23.(1) East of the village _______ a lake five years ago.

(2) He ________ his hand on my shoulder.

A. lie

B. lay

C. laid

D. lain

24.(1) Someone is asking for you, Maybe he will have ______ you.

A. the word with

B. a word with

C. some words to

D. words to

(2) She used to have _______ with her husband.

A. a word

B. the word

C. words

D. some words

25.(1) Our teacher entered the classroom, _______.

(2) Our teacher entered the classroom, with ________.

A. a book in hand

B. book in hand

C. a book in his hand

D. book in his hands

26.(1) ______ many times, but he still couldn’t understand it.

(2) ______ many times, he has already known how to do it.

A. Having been told

B. Having told

C. He had been told

D. Though he had been told

27.(1) To prevent the air ______, something will have to be done.

A. to pollute

B. to be polluted

C. from polluting

D. from being polluted

(2) The bad weather prevented us _______.

A. from going out

B. to go out

C. gone out

D. went out

28.(1) It was not _______ the police arrived and caught the thief.

(2) The book will be printed _______.

A. before long

B. before

C. long before

D. long

29.(1) _______ the sight of the jewels,Mathilde had an idea.

(2) _______ sight of his old friend in the street, he felt very happy.

A. At

B. In

C. Out of

D. Catching

30.(1) _________, we all went to the park.

(2) ________, and we all went to the park.

A. Being a fine day

B. Because the fine day

C. It was a fine day

D. It being a fine day

31.(1) To all the people here ______ the honour for the success.

(2) China _______ the Third World is a developing country.

A. belong

B. belongs

C. belongs to

D. belonging to

32.(1) ______ what the schoolmaster said, the girl’s face turned red.

A. After she heard

B. After hearing

C. To hear

D. To be heard

(2) _______ what the schoolmaster said, she was encouraged.

A. After she has heard

B. After hearing

C. To hear

D. To be heard

33.(1) Do you remember _______ the policeman before?

A. seeing

B. to see

C. saw

D. to be seen

(2) Please remember _______ your hands before dinner.

A. washed

B. being washed

C. to wash

D. washing

34.(1) The letter “X” can _______ an unknown number.

A. be used to express

B. be used to expressing

C. use to express

D. use for expressing

(2) Johnson _______ up early now.

A. used to get

B. is used to getting

C. is used to get

D. used to getting

35.(1) I’ll do whatever I can ______ my English.

A. improve

B. to improve

C. improving

D. to improving

(2) He said he could _______ me with my English.

A. to help

B. helping

C. have helped

D. help

36.(1) ______ hearing the news, he rushed out.

A. On

B. In

C. By

D. At

(2) They were overjoyed ________ the news of his safe return.

A. on

B. in

C. by

D. at

37.(1) Shanghai is in _______.

(2) Shanghai belongs to _______.

A. the East of China

B. the east of China

C. East China

D. the East China

38.(1) _______ from Beijing to Shanghai!

(2) ________ from Beijing to Shanghai?

A. How a long way it is

B. What a long way is it

C. How far is it

D. What a long way it is

39.(1) They have invited us to visit their country, _______ is very kind of them.

A. that

B. it

C. which

D. what

(2) They have invited us to visit their country. _______ is very kind of them.

A.It

B. This

C. Which

D. What

40.(1) There ______ no bus, we had to go by bike.

(2) As there ______ no bus, we had to go by bike.

A. was

B. being

C. had

D. is

41.(1) He insisted that I ______ with him.

A. went

B. go

C. would go

D. going

(2) She insisted that she ________ correct.

A. should be

B. be

C. was

D. were

42.(1) As your spoken English improves, ______ your written English.

A. so does

B. thus will

C. so will

D. does so

(2) He likes playing football, _______ his brother.

A. so will

B. so does

C. does so

D. will so

43.(1) —I haven’t heard from him for a long time.

—What do you think _______?

A. was happening

B. to happen

C. having happened

D. has happened

(2) _______ did you talk with just now?

A. Which

B. What

C. Whom

D. Whose

44.(1) We can’t have you ______ so fast.

A. drove

B. driven

C. drive

D. to drive

(2) The two cheats had the light _______ all night long.

A. to burn

B. burn

C. burnt

D. burning

45.(1) Last year they had the schoolroom _______.

A. to rebuilt

B. rebuild

C. rebuilding

D. rebuilt

(2) He said he had a lot of work _______.

A. to do

B. do

C. did

D. done

46.(1) _____ these pictures, I couldn’t help thinking of those days when I was

in London.

(2) ____ from the top of a thirty-storied building, London looks magnificent.

A. Seeing

B. To see

C. Seen

D. Saw

47.(1) The question ______ now at the meeting is very important.

(2) The question _______ at the meeting last week is very important.

A. discussing

B. discussed

C. being discussed

D. to be discussed

48.(1) The funny story made up by Tom made us ______.

A. laugh

B. laughed

C. to laughing

D. to laugh

(2) Our teacher tried to speak louder in order to made himself _______.

A. hear

B. to hear

C. hearing

D. heard

49.(1) —You’ve bought a new English dictionary. —_______.

(2) You’ve bought a new English dictionary. _____.

A. So have I

B. So did I

C. So I have

D. So I did

50.(1) The more we work for our country, ______ we will feel.

A. happier

B. the happier

C. to more happier

D. the more happily

(2) The more words you know, _____ you can read.

A. the more easier

B. the easier

C. the easily

D. the more easily

51.(1) ______ you need more practice is clear.

(2) ______ we need is more time.

A. What

B. When

C. Which

D. That

52.(1) A singer and dancer _______ present at the party.

A. were

B. was

C. has

D. have

(2) A boy and a girl _______ playing with snow together.

A. are

B. is

C. has

D. have

53.(1) More than 70 percent of the population of our country _______ peasants.

(2) Only 20 percent of the population of this country _____ farming

population.

A. has

B. have

C. is

D. are

54.(1) This is one of the best films that ________ greatly _______ us.

(2) This is the one of the best films that _______ greatly ______ us.

A. is…encouraged

B. has…encouraged

C. are…encouraged

D. have…encouraged

55.(1) He as well as his brother ______ football now.

(2) He and his brother ________ football now.

A. is playing

B. is played

C. are playing

D. are played

56.(1) All of the apples _______ rotten.

(2) All of the apple ________ rotten.

A. are

B. is

C. have been

D. has been

57.(1) A number of books ________ on the subject.

A. published

B. has been published

C. have been published

D. have published

(2) The number of students in that class _______ small.

A. are

B. is

C. have been

D. were

58.(1) _________, she knows a lot of things.

A. So young the girl is

B. Young as the girl is

C. Young so the girl is

D. As young the girl is

(2) _______, she isn’t fit for the job.

A. As the girl is too young

B. Too young as the girl is

C. Since a young girl

D. So young the girl is

59.(1) Do you know ________ John is getting on well with his studies?

(2) Do you know _________ John is getting on with his studies?

A. how

B. which

C. what

D. that

60.(1) Two other boys were on duty ________ John.

(2) There is no one in the room ______ me.

A. except

B. besides

C. beside

D. A and B

61.(1) I have never seen such a clever man ________ he.

(2) He made such an excellent speech ________ everyone respected him.

A. like

B. as

C. that

D. and

62.(1) I have never seen her _______ in black.

(2) The baby is too young ________ himself.

A. dress

B. to dress

C. dressing

D. dressed

63.(1) When I stopped thinking, I found _______ in the classroom.

A. me seated

B. me sitting

C. myself sat

D. myself seated

(2) When I entered the room, I found a little baby _______ on the table.

A. sat

B. sitting

C. seating

D. seating himself

64.(1) Three years later he turned ________ doctor.

(2) Three years later he became ________ doctor.

A. an

B. a

C. x

D. the

65.(1) My brother often plays _______ football after class.

(2) He seldom plays _______ piano at the school.

A. the

B. a

C. x

D. an

66.(1) She is ______ good a teacher that we all like her.

(2) She is _______ good teacher that we all like her.

A. so

B. such

C. such a

D. quite a

67.(1) She often goes to school _______ bike.

(2) She often goes to school _______ my bike.

A. in

B. at

C. on

D. by

68.(1) You’ve just bought a new di ctionary. Could you lend ______ to me?

(2) I’m looking for a house. I’d like ______ with a garden.

A. that

B. it

C. what

D. one

69.(1) —Did you see anyone in the room? —______.

(2) —How many people did you see in the room? —_______.

A. No one

B. None

C. Anyone

D. Any one

70.(1) The top of the cave was ________ twenty feet high.

(2) There is _____ nothing interesting in his speech.

A. nearly

B. most

C. mostly

D. almost

71.(1) Who is the greatest poet _______ today?

(2) Is his grandfather still _______?

A. living

B. alive

C. to live

D. A and B

72.(1) Your composition is well written _______ some spelling mistakes. (2) She goes to school every day _______ Sunday.

A. besides

B. except

C. beside

D. except for

73.(1) If it ______ tomorrow, I won’t go out seeing.

A. rains

B. will rain

C. is going to rain

D. is raining

(2) If you ______ me, I will give you some advice.

A. listen to

B. will listen to

C. listen

D. are listening

74.(1) The new railway will _______ the people on the line.

(2) The people on the line will ______ the new railway.

A. benefit

B. benefit of

C. benefit from

D. benefiting

75.(1) This kind of fruit is ______ sugar and water.

(2) What interested me ______ at the exhibition is the iceboat.

A. mostly

B. best

C. most

D. almost

76.(1) It was such a good film ______ I saw it yesterday.

(2) Don’t talk about such things _______you don’t understand.

A. which

B. that

C. as to

D. as

77.(1) —Have you ______ these books? ---No.

(2) Let me _______ the bill.

A. pay

B. paid for

C. paid

D. paid…for

78.(1) They were made _______ the decision.

(2) The decision has been made ______ to them.

A. know

B. to know

C. known

D. knowing

79.(1) _____ on the stone, you will see farther.

(2) ______ on the stone, and you will see farther.

A. Stand

B. To stand

C. Stood

D. Standing

80.(1) The day we looked forward to _______ at last.

A. come

B. came

C. coming

D. comes

(2) We are looking forward to _______ you again.

A. see

B. seeing

C. saw

D. sees

81.(1) The streets are brightly _______ up.

(2) The ________ candle in the room gave poor light.

A. light

B. lighted

C. lit

D. B and C

82.(1) I _______ that he work out the problem himself.

A. hope

B. expect

C. insist

D. wish

(2) I ______you will write me back soon.

A. hope

B. need

C. want

D. wish

83.(1) —Shall we go with her this afternoon? —________.

(2) —Excuse me for coming in without being asked. —_______.

A. All right

B. That’s right

C. That’s all right

D. Not all right

84.(1) The flower is very beautiful. And it smells _______.

(2) We can guess from her face that she the was really_______with the news.

A. pleasant

B. pleasing

C. please

D. pleased

85. (1) Here is such a big stone _____I can’t move it.

(2) Here is so big a stone _____I can’t move.

A. that

B. what

C. as

D. which

86.(1) —It’s your birthday. Happy birthday to you! —_______.

(2) —Have a nice weekend! —________.

A. Thank you

B. You are the same

C. The same to you

D. OK

87.(1) The workers ______ a new hospital since the end of last year.

(2) The workers ________ a new hospital by the end of last year.

A. have built

B. have been building

C. had built

D. were building

88.(1) The population of China is larger than ______ of the United States.

A. this

B. that

C. these

D. those

(2) A room made of stone is ______ to live in than _______ made of wood.

A. not comfortable / one

B. more comfortable / that

C. less comfortable / one

D. no more comfortable / the room

89.(1) ________ the book will sell depends on its author.

(2) ________the books will be sold out depends on its author.

A. Which

B. Why

C. How

D. Whether

90.(1) I usually go to office by bicycle _____ it rains.

(2) Your room upstairs is comfortable to live in _______ the furniture in it

looks older.

A. except

B. except when

C. except for

D. except that

91.(1) Be careful, and_______ many mistakes in your composition.

(2) Be careful _______ many mistakes in your composition.

A. don’t make

B. not make

C. not making

D. not to make

92.(1) I wrote him a letter and suggested ______ the meeting _______.

A. to put / away

B. to put / off

C. putting / off

D. putting / away

(2) The suggestion that John ______ at once is very good.

A. should start

B. must start

C. started

D. starts

93.(1) It is suggested that students at school ______.

A. would not smoke

B. don’t smoke

C. not smoke

D. smokin g

(2)They gave us a suggestion that we _______ English harder than before.

A. studied

B. should study

C. would study

D. studies

94.(1)The headmaster ______, there were sixty people on the ground.

(2)Fifteen persons were present, _____ the chairman.

A. being including

B. included

C. includes

D. including

95.(1) The medical team ______ six nurses and a doctor has been sent to the

flood areas.

(2) Twelve men and three women______ the medical team.

A. is made of

B. made up of

C. is made up of

D. make up

96.(1) Three-fourths of all scientific papers _______ published first in English.

(2) Two-thirds of the information ______ very useful.

A. is

B. are

C. has

D. have

97.(1) I would rather you ______ tomorrow.

A. come

B. will come

C. came

D. had come

(2) Rather than _____ the vegetables to go bad, he sold them at half price.

A. allow

B. to allow

C. allowing

D. allowed

98.(1) I saw him _____ at the back of the classroom.

(2) As soon as he entered, he ______ himself at the back of the classroom.

A. sat

B. seated

C. being seated

D. seating

99.(1) Think it over, ______ you will get the answer.

(2) Hurry up, ______ we’ll be late for class.

A. became

B. so

C. or

D. and

100.(1) I found her eyes ______ on the hole in the ceiling.

(2) I found her _____ her eyes on the hole in the ceiling.

A. are fixed

B. fixed

C. fixing

D. being fixed

参考答案

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苏教版四年级思维训练100题

四年级思维训练 1、小林家养了46只鸭子,24只鸡,养的鸡和鹅的总数比养的鸭多5只,问小林家养了多少只鹅? 2、一个筐里有52个苹果,另一个筐里装了一些梨,如果从梨筐取走18个梨,那么梨比苹果少12个,原 来筐里有多少个梨? 3、四<1>班为手拉手的小朋友买了若干糖果已知水果糖比小白兔糖多15块,巧克力比水果糖多28块,又 知巧克力糖的块数是小白兔糖的2倍,求四一班共买了多少块糖? 4、一口枯井深230厘米,一只蜗牛要从井底爬到井口,白天向上爬110厘米,晚上向下滑70厘米,蜗牛 第几天白天爬出井? 5、一口枯井深240厘米,一只蜗牛要从井底爬到井口,白天向上爬110厘米,晚上向下滑70厘米,蜗牛 第几天白天爬出井? 6、甲,乙,丙三人原各有桃子若干个。甲给乙2个,乙给丙3个,丙又给甲5个后,三人都有桃子9个。甲,乙,丙三人原来各有桃子多少个? 7、三座桥,第一座长287米,第二座比第一座长85米,第三座桥比第一座与第二座的总长短142米,求三座桥的总长? 8、幼儿园有巧克力糖40块,还有一些奶糖,分掉奶糖24块后,奶糖比巧克力糖少10块,原有奶糖多少块?

9、幼儿园有巧克力糖48块,还有一些奶糖,分掉奶糖26块后,奶糖比巧克力糖少18块,原有奶糖多少块? 10、一桶油重120千克,油用一半后,连通还重65千克,求油有多少千克,空桶中多少千克? 11、一条路每隔40米,有一根电线杆连两端在内,共有21根,这条路有多长? 12、有一条路长四千米,在路的中央每隔80米按一盏灯,2端在内,共需要多少棵树? 13、有一条路长8000米,在路的两侧(两端)每隔8米栽一棵树共需多少棵树? 14、四年级同学去体育场游泳400人排成两路队,相邻两排相距2M,队伍每分走60m,现要通过长41m 的地下通道共需几分钟? 15、验阅彩车共30辆,每辆车长4米,前后相距5米,这个车队有多长? 16、父子攀登一个300个台阶的山坡,父亲每步上3个台阶儿子每步上2个台阶,从起点开始,父子走完这段路一共上了多少个台阶?(重复的只算一次) 17、一个车队以每秒5米的速度缓缓通过一座210米长的大桥,共用了100秒,车队每辆车长5米,相邻两车之间相距10米,问:这个车队共有多少辆车?

(完整word版)四年级下册思维训练题(全)

四年级下册思维训练题(全) 专题简析: 解决算式谜题,关键是找准突破口,推理时应注意以下几点: 1.认真分析算式中所包含的数量关系,找出隐蔽条件,选择有特征的部分作出局部判断; 2.利用列举和筛选相结合的方法,逐步排除不合理的数字; 3.试验时,应借助估值的方法,以缩小所求数字的取值范围,达到快速而准确的目的; 4.算式谜解出后,要验算一遍。 例1.在下面的方框中填上合适的数字。 分析:由积的末尾是0,可推出第二个因数的个位是5;由第二个因数的个位是5,并结合第一个因数与5相乘的积的情况考虑,可推出第一人个因数的百位是3;由第一个因数为376与积为31□□0,可推出第二个因数的十数上是8。题中别的数字就容易填了。 练习一 第二讲乘除法数字谜(二) 例1.下面算式中的a、b、c、d这四个字母各代表什

么数字? 分析:因为四位数abcd乘9的积是四位数,可知a 是1;d和9相乘的积的个位是1,可知d只能是9;因为第二个因数9与第一个因数百位上的数b相乘的积不能进位,所以b只能是0(1已经用过);再由b=0,可推知c=8。 练习二 第三讲图形的个数 例1.下面图形中有多少个正方形? 分析:图中的正方形的个数可以分类数,如由一个小正方形组成的有6times;3=18个,2times;2的正方形有 5times;2=10个,3times;3的正方形有4times;1=4个。因此图中共有18+10+4=32个正方形。 例2.下图中共有多少个三角形? 分析:为了保证不漏数又不重复,我们可以分类来数三角形,然后再把数出的各类三角形的个数相加。 (1)图中共有6个小三角形; (2)由两个小三角形组合的三角形有3个; (3)由三个小三角形组合的三角形有4个; (4)由六个小三角形组合的三角形有1个。 所以共有6+3+4+1=14个三角形。 练习三 1.下图中共有多少个正方形?

思维训练-一年级-3解决问题-1求一共-100题

思维训练-一年级-3解决问题-1求一共 3解决问题-1求一共 一、20以内,一步计算,不进位。 1、学校有10个足球,6个篮球,足球和篮球一共有多少个? 2、妈妈买了12个红扣子,5个白扣子,妈妈一共买了多少个扣子? 3、小华买了两盆花,百合卖15元,月季4元,小华一共花了多少钱? 4、课外活动中,打球的13人,下棋的5人,参加这两种活动的一共有多少人?

5、同学们参加大扫除,男同学有12人,女同学有7人,一共有多少人? 6、学校买来11盆菊花,6盆月季,一共买了多少盆花? 7、一本书,小兰已经看了8页,还有10页没看,这本书一共有多少页? 8、我有5本书,你有3本书,我们一共有多少本书?

9、妈妈买来一捆布,做蚊帐用去5米,还剩14米,这捆布一共有多少米? 10、第一小队有11人,第二小队有6人,两个小队一共有多少人? 11、动物园里有14只小猴,有3只大猴,小猴和大猴一共有多少只? 12、同学们做手工,折纸鹤10只,折纸船8只。纸鹤和纸船一共折了多少只?

13、鸡有13只,鸭有5只。鸡和鸭一共有多少只? 14、黄花有5朵,红花有13朵。黄花和红花一共有几朵? 15、小明搬了6块砖,小华搬了13块砖,他们一共搬了多少块砖? 16、小红家有4只公鸡,有15只母鸡,小红家公鸡和母鸡一共有多少只?

17、小青得了13朵红花,小华多得5朵红花,他们一共得了多少朵红花? 18、梅梅家已经种了6棵西红柿,后来又种了10棵,梅梅家一共种了多少棵西红柿? 19、黑兔有6只,白兔有3只,黑兔和白兔一共有多少只? 20、动物园里有8只小老虎,有11只大老虎,动物园一共有多少只老虎?

五年级数学思维训练100题及解答(全)【精校版】

五年级数学思维训练100题及解答(全) 1.765×213÷27+765×327÷27 解:原式=765÷27×(213+327)= 765÷27×540=765×20=15300 2.(9999+9997+...+9001)-(1+3+ (999) 解:原式=(9999-999)+(9997-997)+(9995-995)+……+(9001-1) =9000+9000+…….+9000 (500个9000) =4500000 3.19981999×19991998-19981998×19991999 解:(19981998+1)×19991998-19981998×19991999 =19981998×19991998-19981998×19991999+19991998 =19991998-19981998 =10000 4.(873×477-198)÷(476×874+199) 解:873×477-198=476×874+199 因此原式=1 5.2000×1999-1999×1998+1998×1997-1997×1996+…+2×1 解:原式=1999×(2000-1998)+1997×(1998-1996)+… +3×(4-2)+2×1 =(1999+1997+…+3+1)×2=2000000。 6.297+293+289+…+209 解:(209+297)*23/2=5819 7.计算: 解:原式=(3/2)*(4/3)*(5/4)*…*(100/99)*(1/2)*(2/3)*(3/4)*…*(98/99) =50*(1/99)=50/99

8. 解:原式=(1*2*3)/(2*3*4)=1/4 9. 有7个数,它们的平均数是18。去掉一个数后,剩下6个数的平均数是19;再去掉一个数后,剩下的5个数的平均数是20。求去掉的两个数的乘积。 解:7*18-6*19=126-114=12 6*19-5*20=114-100=14 去掉的两个数是12和14它们的乘积是12*14=168 10. 有七个排成一列的数,它们的平均数是30,前三个数的平均数是28,后五个数的平均数是33。求第三个数。 解:28×3+33×5-30×7=39。 11. 有两组数,第一组9个数的和是63,第二组的平均数是11,两个组中所有数的平均数是8。问:第二组有多少个数? 解:设第二组有个数,则63+11=8×(9+),解得=3。 12.小明参加了六次测验,第三、第四次的平均分比前两次的平均分多2分,比后两次的平均分少2分。如果后三次平均分比前三次平均分多3分,那么第四次比第三次多得几分? 解:第三、四次的成绩和比前两次的成绩和多4分,比后两次的成绩和少4分,推知后两次的成绩和比前两次的成绩和多8分。因为后三次的成绩和比前三次的成绩和多9分,所以第四次比第三次多9-8=1(分)。 13. 妈妈每4天要去一次副食商店,每5天要去一次百货商店。妈妈平均每星期去这两个商店几次?(用小数表示) 解:每20天去9次,9÷20×7=3.15(次)。 14. 乙、丙两数的平均数与甲数之比是13∶7,求甲、乙、丙三数的平均数与甲数之比。 解:以甲数为7份,则乙、丙两数共13×2=26(份) 所以甲乙丙的平均数是(26+7)/3=11(份) 因此甲乙丙三数的平均数与甲数之比是11:7。 15. 五年级同学参加校办工厂糊纸盒劳动,平均每人糊了76个。已知每人至少糊了70个,并且其中有一个同学糊了88个,如果不把这个同学计算在内,那么平均每人糊74个。糊得最快的同学最多糊了多少个?

(完整版)小学一年级数学思维训练100题

小学一年级思维训练100题 1.哥哥4个苹果,姐姐有3个苹果,弟弟有8个苹果,哥哥给弟弟1个后,弟弟吃了3个,这时谁的苹果多? 2.小明今年6岁,小强今年4岁,2年后,小明比小强大几岁? 3.同学们排队做操,小明前面有4个人,后面有4个人,这一队一共有多少人? 4.有一本书,小华第一天看了2页,以后每一天都比前一天多看2页,第4天看了多少页? 5.同学们排队做操,从前面数,小明排第4,从后面数,小明排第5,这一队一共有多少人? 6.有8个皮球,如果男生每人发一个,就多2个,如果女生每人发一个,就少2个,男生有多少人,女生有多少人? 7.老师给9个三好生每人发一朵花,还多出1朵红花,老师共有多少朵红花? 8.有5个同学投沙包,老师如果发给每人2个沙包就差1个,老师共有多少个沙包? 9.刚刚有9本书,爸爸又给他买了5本,小明借去2本,刚刚还有几本书? 10.一队小学生,李平前面有8个学生比他高竺嬗?个学生比他矮,这队小学生共有多少人? 11.小林吃了8块饼干后,小林现在有4块饼干,小林原来有多少块饼干? 12.哥哥送给弟弟5支铅笔后,还剩6支,哥哥原来有几支铅笔? 13.第二中队有8名男同学,女同学的人数跟男同学同样多,第二中队共有多少名同学? 14.大华和小刚每人有10张画片,大华给小刚2张后,小刚比大华多几张? 15.猫妈妈给小白5条鱼,给小花4条鱼,小白和小花共吃了6条,它们还有几条? 16.同学们到体育馆借球,一班借了9只,二班借了6只。体育馆的球共减少了几只? 17.明明从布袋里拿出5个白皮球和5个花皮球后,白皮球剩下10个,花皮球剩下5个。布袋里原来有多少个白皮球,多少个花皮球? 18.芳芳做了14朵花,晶晶做了8朵花,芳芳给晶晶几朵花,两人的花就一样多? 19.妈妈买回一些鸭蛋和12个鸡蛋,吃了8个鸡蛋后,剩下的鸡蛋和鸭蛋同样多,问妈妈一共买回几个蛋? 20.草地上有10只羊,跑走了3只白山羊,又来了7只黑山羊,现在共有几只羊? 21.冬冬有5支铅笔,南南有9支铅笔,冬冬再买几支就和南南的一样多? 22.小平家距学校2千米,一次他上学走了1千米,想起忘带铅笔盒,又回家去取。这次他到学校共走了多少千米? 23.马戏团有1只老虎,3只猴子,黑熊和老虎一样多,问马戏团有几只动物? 24.春天来了,小明、小冬和小强到郊外捉蝴蝶,小明捉了3只,小冬捉了5只,他们一共捉了12只,小强捉了几只? 25.小华和爸爸、妈妈为植树节义务植树,小华植了1棵,爸爸植了5棵,妈妈比爸爸少植2棵,妈妈植了多少棵,他们一共植了多少棵? 26.第一个盘子里有5个梨,第二个盘子里有4个梨,把第一个盘里拿1个放到第二个盘里,现在一共有多少个梨? 27.小红有2个玩具,小英有3个玩具,小明的玩具比小红多2个,小明有几个玩具? 28.新星小学美术兴趣小组有学生9人,书法兴趣小组的人数和美术兴趣小组的人数同样多,这两个兴趣小组共有多少名学生? 29.3个男同学借走6本书,4个女同学借走7本书,他们一共借走多少本书? 30.王老师有12元钱,正好买一支钢笔和2个笔记本,如果只买一支钢笔,还剩6元钱,你知道一个笔记本多少钱? 31.日落西山晚霞红,我把小鸡赶进笼。一半小鸡进了笼,还有5只在捉虫,另外5只围着我,叽叽喳喳闹哄哄。小朋友们算一算,多少小鸡进了笼? 32.一只猫吃掉一条鱼需要1分钟。照这样,100只猫同时吃掉100条鱼需要几分钟? 33.5个小朋友同时吃5个苹果需要5分钟,照这样,10个小朋友同时吃10个苹果需要几分钟?

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五年级数学思维训练100题

五年级数学思维训练100题 班级:姓名: 1.2006+200.6+20.06+2.006+994+99.4+9.94+0.994=() 2.大小两个数的和是2026.06,将较小数的小数点向右移动两位恰好是大数,则大数减小数等于()。 3、从公园通往湖心的小岛有一条长1020米的小路,在这条小路的两侧,从头到尾每隔15米栽一棵桃树,一共需要栽()棵桃树。 4、买2条毛巾,3块肥皂,要付18元;买3条毛巾,2块肥皂,要付19元(毛巾,肥皂,都分别是同一品种的)。那么买1条毛巾,1块肥皂要付()元。 5、幼儿园老师给几组小朋友分苹果,每组分7个,少3个;每组分6个,则多4个,苹果有()个。 6、按下图方法摆80个三角形,有()个是白色的。 ▲△△▲△▲▲△△▲△▲…… 7、一个班有36个学生,在一次测验中,答对第一题的25人,答对第二题的2 3人,两题都答对的15人。那么,两题都不对的有()人。 8、先找出规律,再按规律填数。 9 4.5 2.25 ()() 0.28125 9、小明的玻璃球是小亮的3倍,如果小明给小亮6颗玻璃球,那么他们俩的玻璃球就一样多。问小明有( )颗玻璃球. 10.有一栋居民楼,每家都订2份不同的报纸,该居民楼共订了三种报纸。其中《楚天都市报》34份,《武汉晚报》30份,《武汉晨报》22份。那么,订《武汉晚报》和《武汉晨报》的共有()家。

11、小红、小丽、小敏三人各有年历卡若干张。如果小红给小丽13 张,小丽给 小敏23张,小敏给小红 3 张,那么她们每人各有40 张。原来小敏有年历卡()张。 12、小红为班里买了33个笔记本。班长发现购物单上没有标明单价,总金额的 字迹模糊,只看到9□.□3元,班长问小红用了多少钱,小红只记得不超过95元,她实际用了()元。 13、在一次数学测验中,包括小明在内的6名同学的平均分为70分,其中小明 得了96分,则小明以外的另5位同学的平均分为()分。 14、小华在计算3.69除以一个数时,由于商的小数点向右多点了一位,结果得 24.6。这道式题的除数是多少? 15、某停车场的收费标准规定:(1)1小时内收2.50元,(2)超过1小时, 每0.5小时收2.50元。有一次,小明的爸爸在该停车场停车交了12.5元。请问:小明的爸爸在这个停车场停车几小时? 16、五(2)班王军同学期中考试语文、英语、综合和数学四门的平均成绩是94 分,其中语文、英语、综合三门的平均成绩是92分,综合、数学两门的平均成绩是95分。他的综合学科成绩是多少分? 17、箱子里装有同样数量的乒乓球和羽毛球。每次取出5个乒乓球和3个羽毛 球,取了几次以后,乒乓球没有了,羽毛球还剩6个。原来乒乓球有多少个?

逻辑思维训练100题.doc

小学一年级数学思维专题训练大全(100 题) 1. 哥哥 4个苹果,姐姐有3个苹果,弟弟有8个苹果,哥哥给弟弟1个后,弟弟吃了3 个,这时谁的苹果多? 2.小明今年6岁,小强今年4岁,2年后,小明比小强大几岁? 3.同学们排队做操,小明前面有4个人,后面有4个人,这一队一共有多少人? 4.有一本书,小华第一天看了2页,以后每一天都比前一天多看2页,第4天看了多少 页? 5.同学们排队做操,从前面数,小明排第 4 ,从后面数,小明排第 5 ,这一队一共有多少 人? 6.有 8个皮球,如果男生每人发一个,就多2个,如果女生每人发一个,就少2个,男生有多少人,女生有多少人? 7.老师给9个三好生每人发一朵花,还多出1朵红花,老师共有多少朵红花?

8.有 5个同学投沙包,老师如果发给每人2个沙包就差1个,老师共有多少个沙包? 9.刚刚有9本书,爸爸又给他买了5本,小明借去2本,刚刚还有几本书? 10.一队小学生,李平前面有8个学生比他高竺嬗?个学生比他矮,这队小学生共有多少人? 11.小林吃了8块饼干后,小林现在有4块饼干,小林原来有多少块饼干? 12.哥哥送给弟弟5支铅笔后,还剩6支,哥哥原来有几支铅笔? 13.第二中队有8名男同学,女同学的人数跟男同学同样多,第二中队共有多少名同学? 14.大华和小刚每人有10张画片,大华给小刚2张后,小刚比大华多几张? 15.猫妈妈给小白5条鱼,给小花4条鱼,小白和小花共吃了6条,它们还有几条? 16.同学们到体育馆借球,一班借了9只,二班借了6只。体育馆的球共减少了几只?

17.明明从布袋里拿出5个白皮球和5个花皮球后,白皮球剩下10个,花皮球剩下5个。 布袋里原来有多少个白皮球,多少个花皮球? 18.芳芳做了14朵花,晶晶做了8朵花,芳芳给晶晶几朵花,两人的花就一样多? 19.妈妈买回一些鸭蛋和12个鸡蛋,吃了8个鸡蛋后,剩下的鸡蛋和鸭蛋同样多,问妈 妈一共买回几个蛋? 20.草地上有10只羊,跑走了3只白山羊,又来了7只黑山羊,现在共有几只羊? 21.冬冬有5支铅笔,南南有9支铅笔,冬冬再买几支就和南南的一样多? 22.小平家距学校2千米,一次他上学走了1千米,想起忘带铅笔盒,又回家去取。这次 他到学校共走了多少千米? 23.马戏团有1只老虎,3只猴子,黑熊和老虎一样多,问马戏团有几只动物? 24.春天来了,小明、小冬和小强到郊外捉蝴蝶,小明捉了3只,小冬捉了5只,他们一 共捉了 12只,小强捉了几只?

四年级思维训练100题复习过程

201年四年级竞赛10(题 1、计算:67+135-5 X 7+264- 8 2、计算:13+29+32+46+57+68+71+85+94 3、计算:364 X 25- (14 - 4 ) 4、计算:(1953+1956+1958+1962+1959+1947+1957 尸7 5、将运算符号“ +,- , X,宁”填在下面的圆圈中,使得算式成立. 202020202=5 &在四个数:10、10、4、4之间填入“ + ”、“一”、“X”、“十” “()”,使写 出的算式的计算结果是24。 7、两个自然数的和是94,积是2013 ,求这两个数。 8、按顺序排列的7个数,它们的平均数是9 ,已知前4个数的平均数是5 ,后4 个数的平均数是12,求第四个数。 9、若5个连续自然数的和是1265,求这5个自然数中最小的数。 10、20至24这5个连续自然数的和再加上2000等于另外4个连续自然数的和,求另外4个连续自然数中最小的数。 11、有3个数a、b、c ,要求计算a- ( b+c),李辉算成了a-b+c,结果多出100, 求c 12、一个两位数,在它的两个数字中间添加一个0,就比原来的数多720 ,这样的两位数最大是多少?. 13、四位数6823的a倍是各位数字不同的最小的六位数,求 a. 14、六位数aabccd 满足:aabccd ddd ddd,求d. 15、某手机号码是abcbdeefcgh ,已知其中不同的字母代表1,2, 3,…,9中的不同的数字,d最大,h比d小2 ,而且a

一年级数学思维训练题100题.doc知识分享

如今,思维训练这一智力已经开始受到广泛的重视,在教育领域用于婴幼儿早教、中小学生思维技能训练,下面给大家带来一年级小学生思维训练100题,大家可以练一练,训练自己的思维。 4.有一本书,小华第一天看了2页,以后每一天都比前一天多看2页,第4天看了多少页? 5.同学们排队做操,从前面数,小明排第4,从后面数,小明排第5,这一队一共有多少人? 6.有8个皮球,如果男生每人发一个,就多2个,如果女生每人发一个,就少2个,男生有多少人,女生有多少人? 7.老师给9个三好生每人发一朵花,还多出1朵红花,老师共有多少朵红花? 8.有5个同学投沙包,老师如果发给每人2个沙包就差1个,老师共有多少个沙包? 9.刚刚有9本书,爸爸又给他买了5本,小明借去2本,刚刚还有几本书?

10.一队小学生,李平前面有8个学生比他高竺嬗?个学生比他矮,这队小学生共有多少人? 11.小林吃了8块饼干后,小林现在有4块饼干,小林原来有多少块饼干? 12.哥哥送给弟弟5支铅笔后,还剩6支,哥哥原来有几支铅笔? 13.第二中队有8名男同学,女同学的人数跟男同学同样多,第二中队共有多少名同学? 14.大华和小刚每人有10张画片,大华给小刚2张后,小刚比大华多几张? 15.猫妈妈给小白5条鱼,给小花4条鱼,小白和小花共吃了6条,它们还有几条? 16.同学们到体育馆借球,一班借了9只,二班借了6只。体育馆的球共减少了几只? 17.明明从布袋里拿出5个白皮球和5个花皮球后,白皮球剩下10个,花皮球剩下5个。布袋里原来有多少个白皮球,多少个花皮球? 18.芳芳做了14朵花,晶晶做了8朵花,芳芳给晶晶几朵花,两人的花就一样多?

五年级数学上册思维训练100题及解答(全) 含答案 (新版)人教版

思维训练100题及解答(全) 1.765×213÷27+765×327÷27 解:原式=765÷27×(213+327)= 765÷27×540=765×20=15300 2.(9999+9997+...+9001)-(1+3+ (999) 解:原式=(9999-999)+(9997-997)+(9995-995)+……+(9001-1) =9000+9000+…….+9000 (500个9000) =4500000 3.19981999×19991998-19981998×19991999 解:(19981998+1)×19991998-19981998×19991999 =19981998×19991998-19981998×19991999+19991998 =19991998-19981998 =10000 4.(873×477-198)÷(476×874+199) 解:873×477-198=476×874+199 因此原式=1 5.2000×1999-1999×1998+1998×1997-1997×1996+…+2×1 解:原式=1999×(2000-1998)+1997×(1998-1996)+… +3×(4-2)+2×1 =(1999+1997+…+3+1)×2=2000000。 6.297+293+289+…+209 解:(209+297)*23/2=5819 7.计算: 解:原式=(3/2)*(4/3)*(5/4)*…*(100/99)*(1/2)*(2/3)*(3/4)*…*(98/99) =50*(1/99)=50/99 8.

解:原式=(1*2*3)/(2*3*4)=1/4 9. 有7个数,它们的平均数是18。去掉一个数后,剩下6个数的平均数是19;再 去掉一个数后,剩下的5个数的平均数是20。求去掉的两个数的乘积。 解: 7*18-6*19=126-114=12 6*19-5*20=114-100=14 去掉的两个数是12和14它们的乘积是12*14=168 10. 有七个排成一列的数,它们的平均数是 30,前三个数的平均数是28,后五个 数的平均数是33。求第三个数。 解:28×3+33×5-30×7=39。 11. 有两组数,第一组9个数的和是63,第二组的平均数是11,两个组中所有数 的平均数是8。问:第二组有多少个数? 解:设第二组有x个数,则63+11x=8×(9+x),解得x=3。 12.小明参加了六次测验,第三、第四次的平均分比前两次的平均分多2分,比后两次的平均分少2分。如果后三次平均分比前三次平均分多3分,那么第四次比第三次多得几分? 解:第三、四次的成绩和比前两次的成绩和多4分,比后两次的成绩和少4分,推知后两次的成绩和比前两次的成绩和多8分。因为后三次的成绩和比前三次的成绩和多9分,所以第四次比第三次多9-8=1(分)。 13. 妈妈每4天要去一次副食商店,每 5天要去一次百货商店。妈妈平均每星期去这两个商店几次?(用小数表示) 解:每20天去9次,9÷20×7=3.15(次)。 14. 乙、丙两数的平均数与甲数之比是13∶7,求甲、乙、丙三数的平均数与甲数之比。 解:以甲数为7份,则乙、丙两数共13×2=26(份) 所以甲乙丙的平均数是(26+7)/3=11(份) 因此甲乙丙三数的平均数与甲数之比是11:7。 15. 五年级同学参加校办工厂糊纸盒劳动,平均每人糊了76个。已知每人至少糊了70个,并且其中有一个同学糊了88个,如果不把这个同学计算在内,那么平均每人糊74个。糊得最快的同学最多糊了多少个?

经典逻辑思维训练题(25题,带答案)

经典逻辑思维训练题(25题,带答案) 快去训练一下你的大脑的逻辑思维能力吧!1.世界级的马拉松选手每天跑步不超过6公里。 因此,如果一名选手每天跑步超过6公里,它就不是一名世界级马拉松选手。 以下哪项与上文推理方法相同?(A)跳远运动员每天早晨跑步。 如果早晨有人跑步,则他不是跳远运动员。 (B)如果每日只睡4小时,对身体不利。 研究表明,最有价值的睡眠都发生在入睡后第5小时。 (C)家长和小孩做游戏时,小孩更高兴。 因此,家长应该多做游戏。 (D)如果某汽车早晨能起动,则晚上也可能起动。 我们的车早晨通常能启动,同样,它晚上通常也能启动。 (E)油漆三小时之内都不干。 如果某涂料在三小时内干了,则不是油漆。 2.19世纪有一位英国改革家说,每一个勤劳的农夫,都至少拥有两头牛。 那些没有牛的,通常是好吃懒做的人。 因此它的改革方式便是国家给每一个没有牛的农夫两头牛,这样整个国家就没有好吃懒做的人了。 这位改革家明显犯了一个逻辑错误。

下列选项哪个与该错误相类似?(A)天下雨,地上湿。 现在天不下雨,所以地也不湿。 (B)这是一本好书,因为它的作者曾获诺贝尔奖。 (C)你是一个犯过罪的人,有什么资格说我不懂哲学?(D)因为他躺在床上,所以他病了。 3.有一天,某一珠宝店被盗走了一块贵重的钻石。 经侦破,查明作案人肯定在甲、乙、丙、丁之中。 于是,对这四个重大嫌疑犯进行审讯。 审讯所得到的口供如下:甲:我不是作案的。 乙:丁是罪犯。 丙:乙是盗窃这块钻石的罪犯。 丁:作案的不是我。 经查实:这四个人的口供中只有一个是假的。 那么,以下哪项才是正确的破案结果?(A)甲作案。 (B)乙作案。 (C)丙作案。 (D)丁作案。 (E)甲、乙、丙、丁共同作案。 4.古代一位国王和他的张、王、李、赵、钱五位将军一同出外打猎,各人的箭上都刻有自己的姓氏。 打猎中,一只鹿中箭倒下,但不知是何人所射。

小学一年级数学思维训练100题88018

小学一年级数学思维训练100题 1.哥哥4 个苹果,姐姐有3 个苹果,弟弟有8 个苹果,哥哥给弟弟1 个后,弟弟吃了3 个,这时谁的苹果多? 2.小明今年6 岁,小强今年4 岁,2 年后,小明比小强大几岁? 3.同学们排队做操,小明前面有4 个人,后面有4 个人,这一队一共有多少人? 4.有一本书,小华第一天看了2 页,以后每一天都比前一天多看2 页,第4 天看了多少页? 5.同学们排队做操,从前面数,小明排第4,从后面数,小明排第5,这一队一共有多少人? 6.有8 个皮球,如果男生每人发一个,就多2 个,如果女生每人发一个,就少2 个,男生有多少人,女生有多少人? 7.老师给9 个三好生每人发一朵花,还多出1 朵红花,老师共有多少朵红花? 8.有5 个同学投沙包,老师如果发给每人2 个沙包就差1 个,老师共有多少个沙包? 9.刚刚有9 本书,爸爸又给他买了5 本,小明借去2 本,刚刚还有几本书? 10.一队小学生,李平前面有8 个学生比他高竺嬗?个学生比他矮,这队小学生共有多少人? 11.小林吃了8 块饼干后,小林现在有4 块饼干,小林原来有多少块饼干? 12.哥哥送给弟弟5 支铅笔后,还剩6 支,哥哥原来有几支铅笔? 13.第二中队有8 名男同学,女同学的人数跟男同学同样多,第二中队共有多少名同学? 14.大华和小刚每人有10 张画片,大华给小刚2 张后,小刚比大华多几张? 15.猫妈妈给小白5 条鱼,给小花4 条鱼,小白和小花共吃了6 条,它们还有几条? 16.同学们到体育馆借球,一班借了9 只,二班借了6 只。体育馆的球共减少了几只? 17.明明从布袋里拿出 5 个白皮球和5 个花皮球后,白皮球剩下10 个,花皮球剩下5 个。布袋里原来有多少个白皮球,多少个花皮球? 18.芳芳做了14 朵花,晶晶做了8 朵花,芳芳给晶晶几朵花,两人的花就一样多? 19.妈妈买回一些鸭蛋和12 个鸡蛋,吃了8 个鸡蛋后,剩下的鸡蛋和鸭蛋同样多,问妈妈一共买回几个蛋?

小学五年级数学思维练习题100道及答案

小学五年级数学思维练习题100道及答案 1.765×213÷27+765×327÷27 解:原式=765÷27×(213+327)= 765÷27×540=765×20=15300 2.(9999+9997+...+9001)-(1+3+ (999) 解:原式=(9999-999)+(9997-997)+(9995-995)+……+(9001-1) =9000+9000+…….+9000 (500个9000) =4500000 3.19981999×19991998-19981998×19991999 解:(19981998+1)×19991998-19981998×19991999 =19981998×19991998-19981998×19991999+19991998 =19991998-19981998 =10000 4.(873×477-198)÷(476×874+199) 解:873×477-198=476×874+199 因此原式=1 5.2000×1999-1999×1998+1998×1997-1997×1996+…+2×1 解:原式=1999×(2000-1998)+1997×(1998-1996)+… +3×(4-2)+2×1 =(1999+1997+…+3+1)×2=2000000。 6.297+293+289+…+209 解:(209+297)*23/2=5819 7.计算: 解:原式=(3/2)*(4/3)*(5/4)*…*(100/99)*(1/2)*(2/3)*(3/4)*…*(98/99) =50*(1/99)=50/99 8.

解:原式=(1*2*3)/(2*3*4)=1/4 9. 有7个数,它们的平均数是18。去掉一个数后,剩下6个数的平均数是19;再 去掉一个数后,剩下的5个数的平均数是20。求去掉的两个数的乘积。 解: 7*18-6*19=126-114=12 6*19-5*20=114-100=14 去掉的两个数是12和14它们的乘积是12*14=168 10. 有七个排成一列的数,它们的平均数是 30,前三个数的平均数是28,后五个 数的平均数是33。求第三个数。 解:28×3+33×5-30×7=39。 11. 有两组数,第一组9个数的和是63,第二组的平均数是11,两个组中所有数的 平均数是8。问:第二组有多少个数? 解:设第二组有x个数,则63+11x=8×(9+x),解得x=3。 12.小明参加了六次测验,第三、第四次的平均分比前两次的平均分多2分,比后两次的平均分少2分。如果后三次平均分比前三次平均分多3分,那么第四次比第三次多得几分? 解:第三、四次的成绩和比前两次的成绩和多4分,比后两次的成绩和少4分,推知后两次的成绩和比前两次的成绩和多8分。因为后三次的成绩和比前三次的成绩和多9分,所以第四次比第三次多9-8=1(分)。 13. 妈妈每4天要去一次副食商店,每 5天要去一次百货商店。妈妈平均每星期去这两个商店几次?(用小数表示) 解:每20天去9次,9÷20×7=3.15(次)。 14. 乙、丙两数的平均数与甲数之比是13∶7,求甲、乙、丙三数的平均数与甲数之比。 解:以甲数为7份,则乙、丙两数共13×2=26(份) 所以甲乙丙的平均数是(26+7)/3=11(份) 因此甲乙丙三数的平均数与甲数之比是11:7。 15. 五年级同学参加校办工厂糊纸盒劳动,平均每人糊了76个。已知每人至少糊了70个,并且其中有一个同学糊了88个,如果不把这个同学计算在内,那么平均每人糊74个。糊得最快的同学最多糊了多少个?

五年级思维训练100题

1.765×213÷27+765×327÷27 解:原式=765÷27×(213+327)= 765÷27×540=765×20=15300 2.(9999+9997+...+9001)-(1+3+ (999) 解:原式=(9999-999)+(9997-997)+(9995-995)+……+(9001-1) =9000+9000+…….+9000 (500个9000) =4500000 3.19981999×19998×19991999 解:(19981998+1)×19998×19991999 =19981998×19998×19991999+19991998 =19998 =10000 4.(873×477-198)÷(476×874+199) 解:873×477-198=476×874+199 因此原式=1 5.2000×1999-1999×1998+1998×1997-1997×1996+…+2×1 解:原式=1999×(2000-1998)+1997×(1998-1996)+… +3×(4-2)+2×1 =(1999+1997+…+3+1)×2=2000000。 6.297+293+289+…+209 解:(209+297)*23/2=5819 7.计算: 解:原式=(3/2)*(4/3)*(5/4)*…*(100/99)*(1/2)*(2/3)*(3/4)*…*(98/99) =50*(1/99)=50/99 8.

解:原式=(1*2*3)/(2*3*4)=1/4 9. 有7个数,它们的平均数是18。去掉一个数后,剩下6个数的平均数是19;再去掉一个数后, 剩下的5个数的平均数是20。求去掉的两个数的乘积。 解: 7*18-6*19=126-114=12 6*19-5*20=114-100=14 去掉的两个数是12和14它们的乘积是12*14=168 10. 有七个排成一列的数,它们的平均数是 30,前三个数的平均数是28,后五个数的平均数是 33。求第三个数。 解:28×3+33×5-30×7=39。 11. 有两组数,第一组9个数的和是63,第二组的平均数是11,两个组中所有数的平均数是8。 问:第二组有多少个数? 解:设第二组有x个数,则63+11x=8×(9+x),解得x=3。 12.小明参加了六次测验,第三、第四次的平均分比前两次的平均分多2分,比后两次的平均分少2分。如果后三次平均分比前三次平均分多3分,那么第四次比第三次多得几分? 解:第三、四次的成绩和比前两次的成绩和多4分,比后两次的成绩和少4分,推知后两次的成绩和比前两次的成绩和多8分。因为后三次的成绩和比前三次的成绩和多9分,所以第四次比第三次多9-8=1(分)。 13. 妈妈每4天要去一次副食商店,每 5天要去一次百货商店。妈妈平均每星期去这两个商店几次?(用小数表示) 解:每20天去9次,9÷20×7=3.15(次)。 14. 乙、丙两数的平均数与甲数之比是13∶7,求甲、乙、丙三数的平均数与甲数之比。 解:以甲数为7份,则乙、丙两数共13×2=26(份) 所以甲乙丙的平均数是(26+7)/3=11(份) 因此甲乙丙三数的平均数与甲数之比是11:7。 15. 五年级同学参加校办工厂糊纸盒劳动,平均每人糊了76个。已知每人至少糊了70个,并且其中有一个同学糊了88个,如果不把这个同学计算在内,那么平均每人糊74个。糊得最快的同学最多糊了多少个?

小学一年级数学思维训练40题及答案

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一年级数学下册 思维训练100题,智力提升必备

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6、棋盒里有黑棋子和白棋子各6粒,杂乱地放在一起,要从棋盒里去摸,你至少必须摸出( )粒棋子才能保证配成一双颜色相同的袜子。 7、①小花和6个小朋友排队,小花站在第2位,小花的后面应该还有( )个小朋友。 ②班长排队做操,从前面数他在第7个,从后面数他排在第6个,小青这队一共有( )人。 ③班长排队做操,他前面有7个同学,他后面有6个同学,班长这队一共有( )人 8、爸爸买了一些桃子,妈妈吃了2个,哥哥、爸爸和我各吃了1个,正好吃了一半。问爸爸买了( )个苹果。 融会贯通

1、哥哥4个苹果,姐姐有3个苹果,弟弟有8个苹果,哥哥给弟弟1个后,弟弟吃了3个,这时谁的苹果多? 2、小明今年6岁,小强今年4岁,2年后,小明比小强大几岁? 3、同学们排队做操,小明前面有4 个人,后面有4 个人,这一队一共有多少人? 4、有一本书,小华第一天看了2 页,以后每一天都比前一天多看2 页,第4 天看了多少页? 5、同学们排队做操,从前面数,小明排第4,从后面数,小明排第5,这一队一共有多少人? 6、有8 个皮球,如果男生每人发一个,就多2个,如果女生每人发一个,就少2个,男生有多少人,女生有多少人?

五年级数学思维训练100题及解答(全)

精品“正版”资料系列,由本公司独创。旨在将“人教版”、”苏教版“、”北师 大版“、”华师大版“等涵盖几乎所有版本的教材教案、课件、导学案及同步练习和 检测题分享给需要的朋友。 本资源创作于2020年8月,是当前最新版本的教材资源。包含本课对应 内容,是您备课、上课、课后练习以及寒暑假预习的最佳选择。 五年级数学思维训练100题及解答(全) 1.765×213÷27+765×327÷27 解:原式=765÷27×(213+327)= 765÷27×540=765×20=15300 2.(9999+9997+...+9001)-(1+3+ (999) 解:原式=(9999-999)+(9997-997)+(9995-995)+……+(9001-1) =9000+9000+…….+9000 (500个9000) =4500000 3.19981999×19991998-19981998×19991999 解:(19981998+1)×19991998-19981998×19991999 =19981998×19991998-19981998×19991999+19991998 =19991998-19981998 =10000 4.(873×477-198)÷(476×874+199) 解:873×477-198=476×874+199 因此原式=1 5.2000×1999-1999×1998+1998×1997-1997×1996+…+2×1 解:原式=1999×(2000-1998)+1997×(1998-1996)+… +3×(4-2)+2×1 =(1999+1997+…+3+1)×2=2000000。 6.297+293+289+…+209 解:(209+297)*23/2=5819 7.计算: 解:原式=(3/2)*(4/3)*(5/4)*…*(100/99)*(1/2)*(2/3)*(3/4)*…*(98/99)

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