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Xếp thành hàng 12, 15, 18 hàng đều thừa 5 hs
=> x‐5 thuộc BC ﴾12; 15; 18﴿ và 200<x‐5<400
BCNN ﴾12; 15; 18﴿
12= 222.3
15= 3.5
18= 2.322
BCNN (12; 15; 18) = 222.322.5 = 4.9.5 = 180
BC (12; 15; 18)= B(180) = {0;180;360;540;......}
mà 200<x‐5<400
nên x‐5=360
x= 360+5= 365
vậy số học sinh khối 6 đó là 365 hs

26 tháng 10 2021

TL

Ta có :

BCNN (12,15,18)=180

Vậy số học sinh khi bớt đi 1 là một bội của 180, do đó bằng 180 k với k là một số tự nhiên.

Theo đề bài ta có

200<180 k<400

<=>1<k≤2

Vậy k=2 và số học sinh của trường khi bớt đi 1 là 180.2=360


Vậy số học sinh của trường đó là :

        360+1=361 (học sinh)

         Đs : 361 học sinh

HT

I. Choose A, B, C, or D for each gap in the following sentences: 1. There  ___________3 apples on the table. A. is        B. are       C. am      D. will be 2. Adrian’s favorite ________is English. A. house      B. activity      C. subject    D. fruit  3. There _________ a big house near our school. A. is        B. are       C. am      D. will be 4. My sister ________ play sports every day. A. doesn’t       B. don’t       C. is      D. isn’t  5.  To be in the school play, Romeo and...
Đọc tiếp

I. Choose A, B, C, or D for each gap in the following sentences: 
1. There  ___________3 apples on the table. 
A. is        B. are       C. am      D. will be 
2. Adrian’s favorite ________is English. 
A. house      B. activity      C. subject    D. fruit  
3. There _________ a big house near our school. 
A. is        B. are       C. am      D. will be 
4. My sister ________ play sports every day. 
A. doesn’t       B. don’t       C. is      D. isn’t  
5.  To be in the school play, Romeo and Juliet, you need to join the ____________. 
A. indoor activities  B. outdoor activities  C. drama club  D. act 
6. Mai __________ at Vinh Quynh Secondary School. 
A. studys       B. study       C. is study    D. studies 
7. My parents __________ in a town house in Ha Noi 
A. lives      B. live      C. living    D. are live 
8. My brother ___________playing soccer outside. 
A. do        B. is      C. does    D. are 
9. Kien often ________ his bike to visit his hometown. 
A. drives      B. flies    C. rides    D. goes 
10. Ha Noi is ____ the north of Viet Nam. 
A. up        B. beside    C. to      D. in 
11. My favorite sport is badminton. What’s _______? – I like swimming 
A. yours      B. mine    C. you    D. hers 
 12.  Look! The girls are _________ rope in the playground. 
A. dancing      B. playing    C. skipping    D. doing 
13. My mother__________ the gardening every Saturday. 
A. does      B. works    C. makes      D. plays 
14. Can you please help me__________? The clothes are dirty. 
A. clean the house   B. sweep the floor  C. do the laundry    D. make the bed 
15. Mrs Trang is a chef in a restaurant so she _______________.  
A. makes dinner    B. makes the bed  C. does the shopping  D. does the laundry 
16. Cần Thơ is in the _______of Viet Nam.  
A. South      B. West    C. North      D. East 
17. Does your house have a pool? 
A. Yes, I do.    B. No, I don’t.   C. Yes, it does.    D. No, she doesn’t. 
18. Who makes the bed every morning? 
A. Jane’s sister.    B. Janes’ sister.  C. Jane of sister.    D. The Jane’s sister. 
19. Does Mary live in an apartment? 
A. Yes, I do.  B. No, I don’t.     C. Yes, she does.  D. No, she does. 
20. Who often __________ the kitchen in your house?  
A. does      B. cleans    C. makes      D. goes 

II. Put the verbs in brackets in the correct tense form 
1.  School(finish)---------------- at 4.30 pm every day. 
2.  ------------you often  (eat) -------lunch in the school canteen? 
3.  Listen! -------------they (sing) ---- in the classroom? 
4.  Susie (go)__________ shopping every week.  
5.  She (have) ------------- long black hair. 
6.  My father (be)------------- very kind. 
7.  I like (do)-----------------arts and crafts. 
8.  What ---------- your brother  (do)-----------now?  He (practice)-------- speaking English. 
9.  Where ---------------you (be)-------------, Phong? – I’m upstairs. I (study)____________ 
10. My father (watch)--------------TV  every evening. 
11. __________ Kate and John (go)__________ to work by bus every day? 
12. We(have)____________lots of fun clubs at our school. 
13. He enjoys doing arts and crafts. He (make)____________ presents for his family 
14. They (eat)__________ out once a week. 
15. Farmers(grow)____________rice, vegetables and different fruits. 
III. There is one mistake in each of the following sentences. Find and correct it.  
1. Mary is tall and have long black hair  ................... 
              A        B     C                       D 
2. I lives with my parents in a town house.  .................... 
         A             B        C    D 
 3. She are going to the supermarket.  .................... 
     A    B      C    D 
4. How many people there are in your family?  .................... 
      A                  B           C      D

5
26 tháng 10 2021

Dễ mà nhưng dài🤨

26 tháng 10 2021

dài thế

Give the correct form of the word given to complete the sentences.11. History is an ……………. subject. (INTEREST)12. They have ……………. in finding a suitable apartment. (DIFFICULT)13. The company has only 60 ……………. (EMPLOY)14. The ……………. way to travel is by plane. (FAST)15. Her English is ……………. than mine. (GOOD)16. What a ……………. party! I’d like go to home. (BORE)17. Few students like him. He is an ……………. teacher. (POPULAR)18....
Đọc tiếp

Give the correct form of the word given to complete the sentences.

11. History is an ……………. subject. (INTEREST)

12. They have ……………. in finding a suitable apartment. (DIFFICULT)

13. The company has only 60 ……………. (EMPLOY)

14. The ……………. way to travel is by plane. (FAST)

15. Her English is ……………. than mine. (GOOD)

16. What a ……………. party! I’d like go to home. (BORE)

17. Few students like him. He is an ……………. teacher. (POPULAR)

18. Some people play sport to be ________, not because they like it. (HEALTH)

19. My aunt works as a ________ at a university. (CHEMISTRY)

20. Students of our school are ________ with one another. (FRIEND)

21. The ________ of the experiment is 20 minutes. (LONG)

22. Be ________! The ground is very wet and slippery. (CARE)

23. When foreigners talk to him, he can speak English ________ with

them. (EASY)                                                                                             

24. I like the fried chicken in our school canteen: it's really ________. (TASTE)

25. Sometimes we are bored and ________ with his long lectures. (SLEEP)

1
26 tháng 10 2021

interesting 

difficulty 

employees

 fastest 

better

boring 

unpopular 

healthy

chemist

friendly

length

careful

easily

tasty

sleepy

26 tháng 10 2021

Tl ;

dificultly

HT

26 tháng 10 2021

They have ………..in finding a suitable apartment ( dificult )

Đáp án :

They have …  difficulty …..in finding a suitable apartment ( dificult )

26 tháng 10 2021

em chỉ mới biết câu hai hoi                                   they s talking photos on holiday .                               

26 tháng 10 2021

1.Anna is kind she s helping friends.

2.They s taking photos on holiday.(từ đúng là taking chứ ko phải là talking nha bạn)

CHÚC BẠN HỌC TỐT

III. Circle the best option  A, B, C or D  to complete the following sentences: 1. My friends and I often do our __________ after school.       A. homework                  B. football                     C. science         D. lessons2. Duy __________ to school every day.       A. cycle                           B. cycles                       C. is cycling     D. is cycles3. My friend has a sister, but she ________ a brother.A. don’t have                   B. not has                    C....
Đọc tiếp

III. Circle the best option  A, B, C or D  to complete the following sentences:

1. My friends and I often do our __________ after school.

       A. homework                  B. football                     C. science         D. lessons

2. Duy __________ to school every day.

       A. cycle                           B. cycles                       C. is cycling     D. is cycles

3. My friend has a sister, but she ________ a brother.

A. don’t have                   B. not has                    C. doesn’t have           D. isn’t have

4. My ________ house is in Ha Noi.

       A. grandmother                B. grandmothers         C. grandmother’s                    D. grandmothers’s

5. Where is ________ bike?

       A. Minh’s             B. Minhs’                    C. Minhs’s                   D. Minhs

6. The dog _______ on the chair.

       A. be                    B. is                              C. am                          D. are

7. The cats _________ under the table.

       A. are                   B. is                            C. am                             D. be

8. The table is between the sofa _________ the lamp.

       A. but                   B. and                         C. of                               D. to

9. Nam is __________. He likes helping his friends.

       A. careful             B. shy              C. clever                      D. kind

10.   Let’s _________ to the library this afternoon.

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

11. – “Where’s Lisa?”

       - She’s ___________ Mum in the kitchen.

     A. helping         B. helps                       C. is helping               D. help

12. _____ they ______reading books in the library? – Yes, they are.

      A.  Is/ reading             B.  Are/reading     C.  Am/reading                  D. Do/read

13.   Look! He _________ play football now.

      A.  playing                  B.  plays                      C. is playing                D.  play

14. Apples ________ good for our health.

      A.  are                         B.  is                C. am                                       D.be

15.She’s a good student. She _________ does her homework on time.

            A. never                                  B. rarely                      C. usually                    D.  sometimes

16. Laura is very _________. She is always entertaining us with jokes and stories.

            A. confident                            B.  funny         C.  caring                     D. creative

17. There are some pictures ________ the wall in my bedroom.

            A. on                                         B.  in             C.  under                     D.  in front of

18. Mr Nam ________ history at our school.

     A. teach                                    B.  teaches                   C. teaching                  D.  to teach

19. We often use a __________ in a maths class.

      A. bike                                    B.  uniform                  C.  compass                 D.  picture book

20. My best friend ________ to school every day. She cycles.

A.    not walk                            B.  don’t walk             C.   isn’t walk              D.  doesn’t walk

1
26 tháng 10 2021

1. My friends and I often do our __________ after school.

       A. homework                  B. football                     C. science         D. lessons

2. Duy __________ to school every day.

       A. cycle                           B. cycles                       C. is cycling     D. is cycles

3. My friend has a sister, but she ________ a brother.

A. don’t have                   B. not has                    C. doesn’t have           D. isn’t have

4. My ________ house is in Ha Noi.

       A. grandmother                B. grandmothers         C. grandmother’s                    D. grandmothers’s

5. Where is ________ bike?

       A. Minh’s             B. Minhs’                    C. Minhs’s                   D. Minhs

6. The dog _______ on the chair.

       A. be                    B. is                              C. am                          D. are

7. The cats _________ under the table.

       A. are                   B. is                            C. am                             D. be

8. The table is between the sofa _________ the lamp.

       A. but                   B. and                         C. of                               D. to

9. Nam is __________. He s helping his friends.

       A. careful             B. shy              C. clever                      D. kind

10.   Let’s _________ to the library this afternoon.

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

11. – “Where’s Lisa?”

       - She’s ___________ Mum in the kitchen.

     A. helping         B. helps                       C. is helping               D. help

12. _____ they ______reading books in the library? – Yes, they are.

      A.  Is/ reading             B.  Are/reading     C.  Am/reading                  D. Do/read

13.   Look! He _________ play football now.

      A.  playing                  B.  plays                      C. is playing                D.  play

14. Apples ________ good for our health.

      A.  are                         B.  is                C. am                                       D.be

15.She’s a good student. She _________ does her homework on time.

            A. never                                  B. rarely                      C. usually                    D.  sometimes

16. Laura is very _________. She is always entertaining us with jokes and stories.

            A. confident                            B.  funny         C.  caring                     D. creative

17. There are some pictures ________ the wall in my bedroom.

            A. on                                         B.  in             C.  under                     D.  in front of

18. Mr Nam ________ history at our school.

     A. teach                                    B.  teaches                   C. teaching                  D.  to teach

19. We often use a __________ in a maths class.

      A. bike                                    B.  uniform                  C.  compass                 D.  picture book

20. My best friend ________ to school every day. She cycles.

A.    not walk                            B.  don’t walk             C.   isn’t walk              D.  doesn’t walk

27 tháng 10 2021

1:Anna s helping her friends.She is kind ;2: They s talking on holiday.Chúc bạn học tốt

Câu 1 Knowledge

Câu 2 Possibility

Câu 3 Famous

Câu 4 Creative

Câu 5 Cheerful

27 tháng 10 2021
3,C ;4,B
26 tháng 10 2021

3. C

4. B

nhớ k mình

Minh often goes _____ in the mountains on the weekend.

A. walking

B. walks

C. walk

D. to walk

26 tháng 10 2021

D.to walk

hok tốt