Có người trả lời rồi mà bạn

mik cx như bn

ok

a: Thay x=25/16 vào A, ta được:

\(A=\left(\dfrac{5}{4}+1\right):\left(\dfrac{5}{4}-3\right)=\dfrac{9}{4}:\dfrac{-7}{4}=\dfrac{-9}{7}\)

b: \(B=\dfrac{2x-6\sqrt{x}+x+3\sqrt{x}-3x-3}{x-9}\)

\(=\dfrac{-3\sqrt{x}-3}{x-9}\)

bạn lên mạng ấn chuyên đề cộng trừ - nhân chia số hữu tỉ là ra

Với \(x=\frac{a}{m},y=\frac{b}{m}\) ( a, b, m ∈ Z, m > 0)

Khi đó x + y =\(\frac{a}{m}+\frac{b}{m}=\frac{a+b}{m}\)  

\(x=\frac{a}{m}.y=\frac{b}{m}\left(a;b;m\in z\right)m>0\)

\(khi\)\(\text{đ}\text{ó}\)\(x+y=\frac{a}{m}+\frac{b}{m}=\frac{a+b}{m}\)

I/ UNSCRAMBLE THE WORDS

II/ DRAW A LINE TO MATCH EACH QUESTION WITH THE ANSWER

III/ DRAW A LINE TO MACTH THE WORDS THAT GO TOGETHER

VI/ PUT THE QUESTIONS FOR THESE ANSWERS

1. .........................................................................................to the zoo ?

- You can get there by bus.

2. .........................................................................................Phu Quoc Island?

- You can get there by ship.

3. .........................................................................................the post office?

- Go along that street. It's by the lake.

4. .........................................................................................the nearest bookshop?

- Go straight ahead. It's on the right.

5. How .....................................................................................?

- A motorbike rider hit him.

6. .........................................................................................live?

- I live in a village.

7. What's .........................................................................................?

- I'ts beautiful. It's got a lot of parks.

8. ................................... New York ?

-It's modern. It's got a lot of buildings.

9. ..................................................................?

- There will be a robot. I'll use it to do the housework.

10. ...............................................................................?

- I have got a stomachache.

11. ..................................................................free time?

- I go camping and surf the Net.

12. . ..................................................................by plane?

- 2 hours.

13. .................................................................. tomorrow?

- It'll very cold and snowy.

14. . ..................................................................?

- There will be a fridge. I'll use it to keep food fresh.

15. . ..................................................................?

- You should use some eye drops

16. . ..................................................................?

- You may get a burn

17. ..................................................................?

- I Snow White. She's very beautiful.

18. . ..................................................................?

- It'll be a large house. It's got a yard.

19. ..................................................................the cat?

- Because it may scratch his face.

20. . ..................................................................your country?

It's often hot. There is much rain.

V. ANSWER THESE QUESTIONS

1. Where is your hometown? .......................................................................................

2. How often do you get there? ....................................................................................

3. How do you get there? ............................................................................................

4. How long does it take you to get there? ..................................................................

5. What is your hometown ?...................................................................................

6. Where did you go for Tet?.........................................................................................

7. Did you get to your hometown?...............................................................................

8. What are the seasons in the North of Vietnam? .......................................................

9. What are the seasons in the central and the south of Vietnam?..................................

10. What is summer in your country? ..................................................................

11. What is spring in your country?..................................................................

12. What is Autumn in your country?..................................................................

13. What is winter in your country?..................................................................

14. What do you do in your time?..............................................................................

15. What's your dream house be ?..........................................................................

xong , bn làm đi nhé!

mai tui cũng thi

NGUYỄN QUỐC CƯỜNG MAI BẠN CŨNG THI TIẾNG ANH HẢ 

hello old friend !

sans tớ có quen cậu à

làm được chưa

15 GIỜ HAY 15 NGÀY BN

NẾU NHƯ LÀ MINH LÀM TG 15 NGÀY :

TRG 1 NGÀY HOÀNG LÀM ĐK : 

1:10=1/10 (CÔNG VIỆC )

TRG 1 NGÀY MINH LÀM ĐK : 

1:15=1/15 (CÔNG VIỆC )

TRG 1 NGÀY HOÀNG LÀM ĐK : 

(1/10 +1/15) x 5 = 5/6(CÔNG VIỆC )

1 NGÀY CẢ 3 NGƯỜI LÀM ĐK :

1/10 + 1/15 + 5/6 =1/1 (CÔNG VIỆC)

NGÀY CẢ 3 NGƯỜI LÀM HẾT CÔNG VIỆC :

1 :1/1 = 1 ( GIỜ )

HK TỐT, CÒN NẾU LÀ 155 H THÌ MK CHỊU