m.n giải giúp em vs ạ
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1 tháng 6 2021
Giải:
a) 126+-20+|124|--320-|-150|
=126-20+124+320-150
=(126+124-150)+(-20+320)
=100+300
=400
b) 43.35-52.23+197:195
=23.280-52.23+192
=8.(280-52)+361
=8.228+361
=1824+361
=2185
c) (13.174+4.174):173-(14.9-14.5):8
=[174.(13+4)]:173-[14.(9-5)]:8
=[174.17]:173-[14.4]:8
=175:173-56:8
=172-7
=289-7
=282
d) 132-[116-(132-128)2]
=132-[116-(4)2]
=132-[116-16]
=132-100
=32
e) 100:{250:[450-(4.53-22.25)]}
=100:{250:[450-(4.(125-25))]}
=100:{250:[450-(4.100)]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
f) -80-[-130-(12-4)2]+20080
=-80-[-130-(8)2]+1
=-80-[-130-64]+1
=-80-[-194]+1
=-80+194+1
=115
Chúc bạn học tốt!
11 tháng 12 2021
a: \(=\dfrac{x-8}{\left(x-2\right)\left(x+2\right)}+\dfrac{3}{2\left(x-2\right)}\)
\(=\dfrac{2x-16+3x+6}{\left(x-2\right)\left(x+2\right)\cdot2}=\dfrac{5}{2\left(x+2\right)}\)
21 tháng 12 2021
a: \(=\dfrac{2x\left(2x+1\right)}{\left(2x+1\right)^2}=\dfrac{2x}{2x+1}\)
DT
Đỗ Thanh Hải
CTVVIP
10 tháng 5 2021
25 Because this TV programme is boring, I don't like it
26 They started playing basketball in 2010
PA
3
H
8 tháng 4 2021
Trong quá trình hơi nước bay lên trời, chúng cọ xát nhiều với không khí nên mang trong mình một lượng điện tích nhỏ. Đến khi tích tụ thành đám mây điện tích đó sẽ lớn lên đến cực lớn. Và nếu hai đám mây trái dấu gặp nhau, giữa chúng sẽ xảy ra hiện tượng phóng điện gọi là sấm sét
13 tháng 4 2022
Bài 8:
Gọi chiều rộng là x
Chiều dài là 18-x
Theo đề, ta có: 2(18-x)-3x=6
=>36-5x=6
=>5x=30
hay x=6
=>Chiều dài là 12m
Diện tích là 12x6=72(m2)
1. If he had hurried, he wouldn't have missed the train.
2. If my brother had left the keys, I could have picked him up at the station.
3. If it hadn't rained, we could have gone.
4. If we had had enough money, we would have gone on a holiday.
5. If Susan had not eaten 4 cream cakes, she would not have felt sick.
6. We would not have got lost if we had had a map.
7. If he had not been late every day, he would not have lost his job.
8. If Peter did not eat so many chips, he would not be fat.
9. If Robert had not started smoking cigarettes, he would not have got a bad cough.
10. If I did not drink too much strong coffee, I could sleep.
11. If I were you, I would not tell anybody about the secret ( Nếu đây là câu chuyển ngược lại thì: You should not tell anybody about this secret)
12. If the weather was fine, we could go out.
13. If he finished his homework, he would not be punished by the teacher.
14. I could do this exercise if it was not very difficult.
15. If I knew Mai's address, I could come to see her.
16. If I had had an umbrella with me, I would not have got wet.
17.Unless you practice more, you can speak English well.
18. If you had not helped me, I would not have been able to finish the report.
19. If I had known she was sick, I would have come to see her.
20. If we had not been busy, we could have gone to the concert.
21. If he had known how to solve the mathematics problem, he would not have got low marks.
22.If they had passed the exam, their family would not have been sad.
23. If she had said sorry, he would not have been angry.
24. If it had not rained last night, I could have gone to the barbecue.
25. If the weather had been nice, we could have gone camping.
26. If the computer had not broken down, I would not have stopped my work.
27. If he had not been angry, he could have said something.
28. If Peter had come, we would not have cancelled the meeting.
29. If he had not been interested in the programme, he would have studied his lesson.
30. If I were a millionaire, I could do something.
31. If I had gone to the party last night, I could have met her.
32. Unless you have flour, you can not make a cake.
33. If we had got some money, we could have had dinner.
34. If I had not worked too hard last night, I would not have felt rather tired.
35. Unless someone rings the police, he will not get away with the money.
36. If he studied hard, he could get good marks.
37. If I were a President, I could carry out the best policy.
38. If I had free time, I could go camping with my friends.
39. If I had not been bust, I could have gone to the cinema with you last night.
40. If he had learned the lesson carefully, he would not have failed the exam.
41. If he had free time, he could go camping with us.
42. If I had enough money, I could go to Thai Lan with my friends.