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28 tháng 10 2021

đây nhé bn 

Ta có: 9 = 32;                            15 = 3.5.

+) Thừa số nguyên tố chung là 3 và riêng là 5.

+) Số mũ lớn nhất của 3 là 2, số mũ lớn nhất của 5 là 1

Khi đó BCNN(9, 15) =32. 5 = 45.

DD
28 tháng 10 2021

\(6n+10=6n+2+8=2\left(3n+1\right)+8⋮\left(3n+1\right)\Leftrightarrow8⋮\left(3n+1\right)\)

mà \(n\)là số tự nhiên nên \(3n+1\inƯ\left(8\right)=\left\{1,2,4,8\right\}\)

\(\Rightarrow n\in\left\{0,1\right\}\)thỏa mãn. 

1.   What is your favorite subject?→  What subject______________________________________________ 2.   My class has 35 students.→ There_____________________________________________________ 3.   Mai live near her school.→  Mai’s house isn’t___________________________________________ 4.   Mary plays the piano very well.→  Mary is good______________________________________________ 5.   Do you like physics?→  Are you interested__________________________________________...
Đọc tiếp

1.   What is your favorite subject?

→  What subject______________________________________________

2.   My class has 35 students.

There_____________________________________________________

3.   Mai live near her school.

→  Mai’s house isn’t___________________________________________

4.   Mary plays the piano very well.

→  Mary is good______________________________________________

5.   Do you like physics?

→  Are you interested__________________________________________

6.   The school has a computer room and a library.

→  There____________________________________________________

7.   My house has got five rooms.

→  There

8.   There isn’t a telephone in the living room.

→  We

9.   The house is behind the trees.

→  There are trees

10. There are only a few biscuits in the packet.

→  There aren’t ...............................................................................................................................

11. There are two bathrooms in that house.

→  That house ...............................................................................................................................

12. I like the kitchen most.

→  My favourite...............................................................................................................................

13. Is there a garden in front of the house?

→  Does the hous...............................................................................................................................

14. Mrs. Huyen's eyes are round and black.                    

→ Mrs.huyen...............................................................................................................................

15.  His eyes are blue.         

→ His ...............................................................................................................................

16 . Her cheeks are chubby

→ She...............................................................................................................................

17.  Miss Huong's face is round.

→ Miss huong ...............................................................................................................................

18.  Miss Thanh's legs are long.

→ Miss Thanh...............................................................................................................................

19. Her eyes are brown and big.

→ She has ...............................................................................................................................

22.The children have got new schoolbags.

→ They ...............................................................................................................................

23. Mr. William has got a cat.

→ It ...............................................................................................................................

24. My brother has got a girlfriend.

→ Anna...............................................................................................................................

25. The students have got umbrellas.

→ These ...............................................................................................................................

26. Has John got a jacket?

→ Is ...............................................................................................................................

27. Jose and July have got some friends.

→ These ...............................................................................................................................

28. My brother has got big brown eyes.

→ My ...............................................................................................................................

29. Math is Trung’s favorite subject at school.

      → Trung  ...............................................................................................................................

30. The dog is in front of the microwave.

      → The microwave .....................................................................................................................

 

31. I like the kitchen most.

      → My ...............................................................................................................................

32. I usually walk to school.

    I ...............................................................................................................................v

1
28 tháng 10 2021

1.   What is your favorite subject?

→  What subject___do you li ke best ?________

2.   My class has 35 students.

→ There____are 35 students in my class_______

3.   Mai live near her school.

→  Mai’s house isn’t____far from school________

4.   Mary plays the piano very well.

→  Mary is good___at playing the piano________

5.   Do you physics?

→  Are you interested___in physics ?______

6.   The school has a computer room and a library.

→  There__is a computer room and a library in the school_____

7.   My house has got five rooms.

→  There are five rooms in my house

8.   There isn’t a telephone in the living room.

→  We don't have a telephone in the living room

9.   The house is behind the trees.

→  There are trees is in front of the house

10. There are only a few biscuits in the packet.

→  There aren’t ...many biscuits in the packet.............

11. There are two bathrooms in that house.

→  That house ..has two bathrooms .......................

12. I li ke the kitchen most.

→  My favourite....room is the kitchen........................

13. Is there a garden in front of the house?

→  Does the house behind a garden...........................

14. Mrs. Huyen's eyes are round and black.                    

→ Mrs.huyen...has round and black eyes.........................

15.  His eyes are blue.         

→ He has blue eyes................

16 . Her cheeks are chubby

→ She....has chubby cheeks...............................

17.  Miss Huong's face is round.

→ Miss huong ....has a round face............................

18.  Miss Thanh's legs are long.

→ Miss Thanh....has long legs.........................

19. Her eyes are brown and big.

→ She has ....brown and big eyes..........................

29. Math is Trung’s favorite subject at school.

      → Trung  ......li kes math best ............................

30. The dog is in front of the microwave.

      → The microwave .....is behind the dog.........................................

32. I usually walk to school.

    → I ....usually go to school by foot............................................................

* Câu 22 đến 28 mk ko bt lm ạ !! Mong bn thongcam :) *

Câu 3. Em hãy đổi lần lượt các nhiệt độ đo được trong thang nhiệt độ Fahrenheit sang thang nhiệt độ Celcius.

a. 100 độF             b. 120độF                 c. 30độF               d. 200độF

28 tháng 10 2021

A .100 độ F