các bạn gúp mình nha;1 hình thang có đáy lớn bằng 40m,đấy bé bằng 35% đáy lớn và chiều cao 8m.tính diện tích hình thang
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VB
4
4 tháng 12 2021
1. Letters are typed in the office by Mary.
2. You’ll be helped by his father tomorrow.
3. The human life has completely been changed with science and technology.
4. This bottle was broken by Peter.
5. English is being learnt in the room.
6. My mind can’t be changed.
7. I hadn’t been told about it.
8. Her telephone number isn’t known.
9. The children will be brought home by my students.
10. I was sent a present last week.
11. We were given more information.
12. All the workers of the plan were being instructed by the chief engineer.
13. Tea can’t be made with cold water.
14. Some of my books have been taken away.
15. The meeting will be held before May Day.
16. The engine of the car has to be repaired.
17. The window was broken and some pictures were taken away by the boys.
18. A lot of money is spent on advertising every day.
19. A story is going to be told by teacher.
20. A cake is being cut with a sharp knife by Mary.
21. The woman with a red hat was looked at by the children.
22. The victims have been provided with food and clothing.
23. English is spoken in almost every corner of the world.
24. This machine mustn’t be used after 5:30 p.m.
25. After class, the chalk board is always erased by one of the students.
26. Is English taught here?
27. Will she be invited to your wedding party?
28. Has the work been finished by Tom?
29. Were some exercises given by the teacher?
30. Has the window of the laboratory been changed?
Cre: gg
#Jen
4 tháng 12 2021
- 1. Letters are typed in the office by Mary.
- 2. You’ll be helped by his father tomorrow.
- 3. The human life has completely been changed with science and technology.
- 4. This bottle was broken by Peter.
- 5. English is being learnt in the room.
- 6. My mind can’t be changed.
- 7. I hadn’t been told about it.
- 8. Her telephone number isn’t known.
- 9. The children will be brought hnh độ tiếng Anh lớp 4 số 1ome by my students.
- 10. I was sent a present last week.
- 11. We were given more information.
- 12. All the workers of the plan were being instructed by the chief engineer.
- 13. Tea can’t be made with cold water.
- 14. Some of my books have been taken away.
- 15. The meeting will be held before May Day.
- 16. The engine of the car has to be repaired.
- 17. The window was broken and some pictures were taken away by the boys.
- 18. A lot of money is spent on advertising every day.
- 19. A story is going to be told by teacher.
- 20. A cake is being cut with a sharp knife by Mary.
- 21. The woman with a red hat was looked at by the children.
- 22. The victims have been provided with food and clothing.
- 23. English is spoken in almost every corner of the world.
- 24. This machine mustn’t be used after 5:30 p.m.
- 25. After class, the chalk board is always erased by one of the students.
- 26. This dish is brought to me (by the waiter).
- 27. These postcards are sent to us(by our friend).
- 28. This story was told to them(by their grandmother) when they visited her last week.
- 29. This train ket was ordered for Tim's mother.
- 20. The special cameras weren't showed to me.
@sherry
HT~~~(^^)
7 tháng 2 2022
TL
2367 - 317 + 45 x 2
= 2367 - 317 + 90
= 2050 + 90
= 2140
nha
=HT=
HN
23 tháng 2 2018
\(\frac{2016}{2017}\)và \(\frac{2014}{2019}\) Phân số trung gian: \(\frac{2016}{2019}\)
Ta có:
\(\frac{2016}{2017}>\frac{2016}{2019}>\frac{2014}{2019}\)
Vậy \(\frac{2016}{2017}>\frac{2014}{2019}\)
23 tháng 2 2018
Ta có : 2016/2017 > 2014/2017
2014/2017 > 2014/2019
=> 2016/2017 > 2014/2019
Tk mk nha
DM
0
HT
2
8 tháng 12 2015
Cách 1 :
C = 1 + 3 + 5 + ... + 997 + 999
C = ( 1 + 999 ) + ( 3 + 997 ) + .... + ( 499 + 501 )
C = 1000 + 1000 + ... + 1000 ( 250 chữ số 1000 )
C = 1000 x 250
C = 250 000
Cách 2 :
Dãy C có số số hạng là :
( 999 - 1 ) : 2 + 1 = 500 ( số )
Tổng của dãy C là :
( 999 + 1 ) x 500 : 2 = 250 000
Nhớ tick cho mik nha !
8 tháng 12 2015
số các số là:
(999-1)/2+1=500(số)
Vậy C là:
(999+1)*500/2=250 000
Đáp số: 250 000
Đáy bé là: 40:100 x 35 = 14(m)
Diện tích hình thang:
(40+14)x8:2= 216 (m2)
Đ/s:216 m2
216 m2