giup minh voi may ban oi 

a: =-3/4+1/2-1/13+3/13=-1/4+2/13=-13/52+8/52=-5/52

b: =10/11+1/11-1/8=1-1/8=7/8

c: =4(2,86+3,14)-30,05+9x0,75

=24-30,05+6,75

=0,7

giúp cái j cơ vít k dấu ai hỉu.xin đề luyện văn 6 á???

=>2(2x+1)-2x+3>=6

=>4x+2-2x+3>=6

=>2x+5>=6

=>2x>=1

=>x>=1/2

1. was having

2. take

3. was crying

4. are learning

5. have gone

6. go

7. came

8. was playing

9. playing

10. came

giup minh voi minh sap phai lop bai roi 

??? đâu đâu giúp j

4 has not been - broke

5 did you - was

6 have youy ever been

II

1 go

2 were

3 eats

7 does - won't worry

8 had played - would have won

9 will - do

10 were - would go

14 would have written

15 won't go

16 tries

17 spoke

19 finish - will go

20 see - ask

Rewrite

1 The man who doesn't work hard can't earn more money

3 If my friend and I had enough money, we would buy a  house of our town

4 If the weather were better now, we could go for a walk

5 If I knew his addres, I would give it to you

6 If he worked slowly enough, he wouldn't make

7 If I were sent to proson, she would visit me 

8 If I won a big prize in a lottery, I would give up my job

9 If the doctor weren't so late, he could see many patients

10 If tickets weren't expensive, we would visit them in Ha Noi

III

1 were

2 would visit

3 would give

\(3km^24dam^2=3,004km^2\)