Có ai giỏi toán lớp 7 ko?
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H
1
NH
17
NH
ai có đề thi học sinh giỏi cấp huyện môn toán lớp 7 ko gửi cho mình nha(có đáp án nhé)
mk sẽ tick cho
7
NH
5
NH
5
16 tháng 4 2018
ĐỀ SỐ 1
Thời gian làm bài: 120 phút
Câu 1: (2 điểm) Cho biểu thức:
a, Rút gọn biểu thức
b, Chứng minh rằng nếu a là số nguyên thì giá trị của biểu thức tìm được của câu a, là một phân số tối giản.
Câu 2: (1 điểm)
Tìm tất cả các số tự nhiên có 3 chữ số 
sao cho 
Câu 3: (2 điểm)
a. Tìm n để n2 + 2006 là một số chính phương
b. Cho n là số nguyên tố lớn hơn 3. Hỏi n2 + 2006 là số nguyên tố hay là hợp số.
Câu 4: (2 điểm)
a. Cho a, b, n thuộc N*. Hãy so sánh 
b. Cho 
. So sánh A và B.
Câu 5: (2 điểm)
Cho 10 số tự nhiên bất kỳ: a1, a2, ....., a10. Chứng minh rằng thế nào cũng có một số hoặc tổng một số các số liên tiếp nhau trong dãy trên chia hết cho 10.
Câu 6: (1 điểm)
Cho 2006 đường thẳng trong đó bất kì 2 đường thẳng nào cũng cắt nhau. Không có 3 đường thẳng nào đồng qui. Tính số giao điểm của chúng.
ĐỀ SỐ 2
Thời gian làm bài: 120 phút
Câu 1:
a. Tìm các số tự nhiên x, y. sao cho (2x + 1)(y – 5) = 12
b.Tìm số tự nhiên sao cho 4n-5 chia hết cho 2n-1
c. Tìm tất cả các số 
, biết rằng số B chia hết cho 99
Câu 2.
a. Chứng tỏ rằng 
là phân số tối giản.
b. Chứng minh rằng: 
Câu 3:
Một bác nông dân mang cam đi bán. Lần thứ nhất bán 1/2số cam và 1/2 quả; Lần thứ 2 bán 1/3 số cam còn lạivà 1/3 quả; Lần thứ 3 bán 1/4 số cam còn lại và 3/4 quả. Cuối cùng còn lại 24 quả. Hỏi số cam bác nông dân đã mang đi bán.
Câu 4:
Cho 101 đường thẳng trong đó bất cứ hai đường thẳng nào cũng cắt nhau, không có ba đường thẳng nào đồng quy. Tính số giao điểm của chúng.
ĐỀ SỐ 3
Thời gian làm bài: 120 phút
Bài 1: (1,5 điểm) Tìm x
a) 5x = 125; b) 32x = 81;
c) 52x-3 – 2.52 = 52.3;
Bài 2: (1,5 điểm)
Cho a là số nguyên. Chứng minh rằng: |a| < 5 ↔ - 5 < a < 5
Bài 3: (1,5 điểm)
Cho a là một số nguyên. Chứng minh rằng:
a. Nếu a dương thì số liền sau a cũng dương.
b. Nếu a âm thì số liền trước a cũng âm.
c. Có thể kết luận gì về số liền trước của một số dương và số liền sau của một số âm?
Bài 4: (2 điểm)
Cho 31 số nguyên trong đó tổng của 5 số bất kỳ là một số dương. Chứng minh rằng tổng của 31 số đó là số dương.
Bài 5: (2 điểm)
Cho các số tự nhiên từ 1 đến 11 được viết theo thứ tự tuỳ ý sau đó đem cộng mỗi số với số chỉ thứ tự của nó ta được một tổng. Chứng minh rằng trong các tổng nhận được, bao giờ cũng tìm ra hai tổng mà hiệu của chúng là một số chia hết cho 10.
Bài 6: (1,5 điểm)
Cho tia Ox. Trên hai nữa mặt phẳng đối nhau có bờ là Ox. Vẽ hai tia Oy và Oz sao cho góc xOy và xOz bằng 1200. Chứng minh rằng:
a. Góc xOy = xOz = yOz
b. Tia đối của mỗi tia Ox, Oy, Oz là phân giác của góc hợp bởi hai tia còn lại.
PA
11 tháng 1 2019
tiếc quá chị ơi , em cũng muốn tìm người bạn. nhưng em mới lớp 7 thôi. hay chị em mình làm bạn nhé.
NT
9
29 tháng 8 2016
PART A: PHONETICS (2pts)
Section I: Choose the word which has the underlined part pronounced differently from the others.(1pt)
1. A. school B. chair C. chemistry D. character
2. A. serious B. symptom C. sugar D. sauce
3. A. order B. novel C. portable D. score
4. A. coop B. cartoon C. stool D. indoors
Section II. Choose the word that has different stress from others.(1pt)
1. A. complete B. detective C. gather D. event
2. A. mixture B. allow C. affect D. disease
3. A. exit B. cushion C. turtle D. improve
4. A. museum B. useful C. cavity D. wedding
PART B: VOCABULARY AND GRAMMAR.(10pts)
Section I: Choose the best answer from A,B,C or D to fill in the gaps.(2pts)
1. She is staying................................her uncle and aunt's house.
A. at B. in C. with D. on
2. Their trip to Da Lat ....................wonderful.
A. was B. were C. are D. is
3. There is............................meat in the box.
A. any B. a few C. a little D. many
4. Don't forget .....................your teeth before going to bed.
A. brush B. to brush C. brushing D. not to brush
5 You ............................stay at home when you are sick.
A. had better B. should C. mustn't D. A and B
6. He doesn't like candy. I.................
A. don't too B. don't, either C. don't neither D. do so
7. I divided the sweets.....................several boys.
A. during B. between C. into D. among
8. He was only ten, but he ate........................his father did.
A. as much as B. more that C. much than D. as much than
Section II: Supply the correct tense for the verbs in brackets.(2pts)
1. My mother often (go)..............to the market every morning but she ( not go)....................there this morning.
=> .........................................................................................................
2. When (you/ have).........................the last medical check-up?
=> .........................................................................................................
3. Why ( you/ not take) ..................part in the picnic last Sunday?
=> .........................................................................................................
4. Where ( your teacher/ be)....................?
- He (explain)......................a new lesson in that class.
=> .........................................................................................................
=> .........................................................................................................
5. I (pick)...............you up at your hotel in half an hour.
=> .........................................................................................................
6. We can't go out now because it (rain) .
=> ................................................................................................
Section III: Give the correct form of the words in brackets.(2pts)
1. The noise in the city kept Hoa...................at night. (Wake)
2. In................to that, my bike tires was flat. (Add)
3. Mr. Tan has a very...............................tooth. (Pain)
4. Then, Thanh.................a pan and stir-fried the beef. (Hot)
5. Sugar is not an......................food because we need it to live. (Health)
6. Catching the common cold is..................for every body. (Please)
7. Don't worry! Your cold will last for a few days and then................ (Appear)
8. I have.................time to play than my friend. (Little)
Section IV: Finish each of the following sentences in such a way that it is as similar as possible in meaning to the sentence printed before it.(2pts)
1 Listening to music is more interesting than watching TV.
=> I prefer........................................................................................................
2. It isn't important for you to finish the work today.
=> You don't......................................................................................................
3. How much is this dictionary?
=> What ........................................................................................................?
4. How heavy is the chicken?
=> What...........................................................................................................?
5. Mr. Trung and Mrs. Trung type quickly .
=> Mr. Trung and Mrs. Trung..................................................................................
6. I got to work in half an hour yesterday.
=> It took ..........................................................................................................
7. My mother doesn't like coffee and tea.
=> My mother likes neither....................................................................................
8. You shouldn't eat too much candy.
=> You'd...........................................................................................................
Section V: There is a mistake in each of these sentences. Underline the mistake and then correct it. (2pts)
1. The dirt on vegetables can cause you sick .
=> ..................................................................................................................
2. Scientists say that the life started in the ocean .
=> .................................................................................................................
3. He gave up to smoke 2 years ago.
=> ...................................................................................................................
4. He is a fast runner. He runs fastly.
=> ...................................................................................................................
5. Can I lend your pencil? I'm sorry. I'm using it.
=> ...................................................................................................................
6. You should keep silently when they are working.
=> ..................................................................................................................
7. How many times in a day do you brush your teeth ?
=> ...................................................................................................................
8. Long is worried because he has see the dentist.
=> ...................................................................................................................
PART C: READING.( 4pts)
Section I: Read the following story and write true (T) or false (F). (1.5pts)
When Dave was young, he played a lot of games, and he was thin and strong, but when he was forty-five, he began to get fat and slow. He was not able to breathe as well as before, and when he walked rather fast, his heart beat painfully.
He did not do anything about this for a long time, but finally he became anxious and went to see a doctor, and the doctor sent him to a hospital. Another young doctor examined him there and said, " I don't want to mislead you, Mr. Dave. You are very ill, and I believe that you are unlikely to live much longer. Would you like me to arrange for anybody to come and see you before you die?
Dave thought for a few seconds and then he answered, "I'd like another doctor to come and see me".
Your answers:
1. Dave was fat and slow until he was forty five.
2. As soon as Dave had trouble in breathing and walking, he went to see a doctor.
3. Dave was afraid he was ill.
4. The young doctor thought Dave was going to die soon.
5. He wanted to see another doctor, first.
6. Dave did not trust the young doctor.
Section II: Read the passage and write ONE suitable word for each space. (2.5pts)
Many people nowadays have to wear false teeth when they was middle-aged.
Since the beginning of this century,(1)..................decay has greatly increased. The amount(2) ..................sugar in our food has also increased Doctors and dentists now know that(3)..........................is the chief cause of tooth(4) ................ Eskimos' teeth, for example, started to(5)..........when they began to eat sweet(6)..................
Long ago doctors did not like(7).........treat people's teeth. Barbers and blacksmiths(8)................after people's teeth and pulled them(9)............ when they decayed. Some people thought(10)..................................was a punishment from the gods.
PART D: READING.( 4pts)
Section I: Using the givens words to write a passage. (2pts)
Dung/ go/ Nha Trang/ family/ vacation/ last month//. She/ stay/ hotel/ side/ beach//. In the early morning/ she/ go/ sea/ swim/an hour//. Then/ she/ breakfast/ food stall/ beach/ enjoy/ fresh air/ morning//. Afternoon/ she/ take/ photos/ sights//. She/ stay/ Nha Trang/ four days/ took/ nice photos//. She/ also/ buy/ postcards/ souvenirs/ friends//. It/ be/ great vacation/ because/ she/ have/fun.
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Section II: Write a passage about 150 words to describe the activities at recess (2pts)
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
THE END
29 tháng 8 2016
Đáp án:
PART A: PHONETICS (2pts)
Section I: Choose the word which has the underlined part pronounced differently from the others. (1pt) (0.25x4=1pt)
1. B 2. C 3. B 4. D
Section II. Choose the word that has different stress from others. (1pt) (0.25x4=1pt)
1. C 2. A 3. D 4. A
PART B: VOCABULARY AND GRAMMAR.(10pts)
Section I: Choose the best answer from A,B,C or D to fill in the gaps.(2pts) (0.25x8=2pts)
1. A 2. D 3. C 4. B
5. D 6. B 7. D 8. A
Section II: Supply the correct tense for the verbs in brackets. (2pts) (0.25x8=2pts)
1. My mother often goes to the market every morning but she doesn't go there this morning.
2. When did you have the last medical check-up?
3. Why didn't you take part in the picnic last Sunday?
4. Where is your teacher?
- He is explaining a new lesson in that class.
5. I will pick you up at your hotel in half an hour.
6 We can't go out now because it is raining
Section III: Give the correct form of the words in brackets.(2pts) (0.25x8=2pts)
1. awake 2. addition 3. painful 4. heated
5. unhealthy 6. unpleasant 7. disappear 8. less
Section IV: Finish each of the following sentences in such a way that it is as similar as possible in meaning to the sentence printed before it.(2pts) (0.25x8=2pts)
1. I prefer listening to music to watching TV.
2. You don't have/need to finish the work today.
3. What is the price of this dictionary?
4. What is the weight of chicken?/ What is the chicken's weight?
5. Mr. Trung and Mrs are quick typists .
6. It took me half an hour to get to work yesterday .
7. My mother likes neither coffee nor tea .
8. You'd better not eat too much candy.
Section V: There is a mistake in each of these sentences. Underline the mistake and then correct it.(2pts) (0.25x8=2pts)
1. The dirt on vegetables can make you sick.
2. Scientists say that life started in the ocean.
3. He gave up smoking 2 years ago.
4. He is a fast runner. He runs fast.
5. Can I borrow your pencil? I'm sorry. I'm using it.
6. You should keep silent when they are working.
7. How many times a day do you brush your teeth?
8. Long is worried because he has to see the dentist.
PART C: READING.( 4pts)
Section I: Read the following story and write true(T) or false(F). (1.5pts) (0.25x6=1.5pts)
1. F 2. F 3. T 4. T 5. F 6. T
Section II: Read the passage and write ONE suitable word for each space.(2.5pts)
Your answers: (0,25x10=2.5pts)
1. tooth 2.of 3. sugar 4. decay 5. decay
6. food 7. to 8. looked 9. out 10. toothache
PART D: READING.( 4pts)
Section I: Using the givens words to write a passage. (0,25x8=2pts)
Dung went to Nha Trang with her family on vacation last week. She stayed at a hotel on the side of the beach. In the early morning, she went to the sea and swam for an hour. Then she had breakfast in the food stall on the beach to enjoy fresh air in the morning. In the afternoon, she took some photos of the sights. She stayed in Nha Trang for four days and took of a lot of nice photos. She also bought some postcards and souvenirs for her friends. It was a great vacation because she had a lot of fun.
Section II: Write a passage about 150 words to describe the activities at recess. (2pts)
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