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21 tháng 7 2023

\(9!-8!-7!.8^2=9!-8!-8!.8=8!\left(9-1-8\right)=8!.0=0\)

21 tháng 7 2023

\(\left(10^2+11^2+12^2\right):\left(13^2+14^2\right)\)

\(=\left(100+121+144\right):\left(169+196\right)\)

\(=365:365=1\)

21 tháng 7 2023

BTC là gì vậy

AH
Akai Haruma
Giáo viên
21 tháng 7 2023

Lời giải:
Trung bình cộng của 2 số: $9876$

Tổng của hai số: $9876\times 2=19752$
Một trong hai số là: $1230$

Số còn lại là; $19752-1230=18522$

21 tháng 7 2023

\(\left(37+18\right).\left\{3250-15^2.\left[\left(4^4-2^5\right):16\right]\right\}\)

\(=55.\left\{3250-225.\left[\left(256-32\right):16\right]\right\}\)

\(=55.\left\{3250-225.14\right\}\)

\(=55.\left\{3250-3150\right\}=55.100=5500\)

21 tháng 7 2023

( 37 + 18 ) . { 3250 - 152 . [ 44 - 25 ) : 16 ] }

= 55 . { 3250 - 225 . ( 256 - 32 ) : 16 ] }

= 55 . { 3250 - 225 . 224 : 16  }

= 55 . { 3250 - 3150 }

= 55 . 100

= 5500.

21 tháng 7 2023

\(\left[400-\left(40:2^3+3.5^3\right)\right]:5\)

\(=\left[400-\left(40:8+3.125\right)\right]:5\)

\(=\left[400-\left(5+375\right)\right]:5\)

\(=\left[400-380\right]:5=20:5=4\)

21 tháng 7 2023

4/19

HQ
Hà Quang Minh
Giáo viên
21 tháng 7 2023

Số trang sách còn lại sau 2 ngày đầu là: 

30 : 20% = 150 (trang)

Số trang sách còn lại sau ngày đầu là: 

150 : 40% = 375 (trang) 

Số trang sách ban đầu của cuốn sách là:

375 : 60% = 625 (trang)

Vậy cuốn sách có 625 trang.

21 tháng 7 2023

cứu tui với tui cần gắp mn ơi

1. What time do you go to school, Mai? A. Yes, at 6.45 a.m                 B. 6.45 a.m                C. At 2.45 a.m                 D. At 6.45 a.m 2. How many …………….do you have today ? A. sujects                         B. subjects                         C. pupils                           D. childrens 3. . My father ……………….a book last night . A....
Đọc tiếp

1. What time do you go to school, Mai?

A. Yes, at 6.45 a.m                 B. 6.45 a.m                C. At 2.45 a.m                 D. At 6.45 a.m

2. How many …………….do you have today ?

A. sujects                         B. subjects                         C. pupils                           D. childrens

3. . My father ……………….a book last night .

A. reads                          B. readed                              C. read                           D. rode

4. Nam is good ………….Music , but he is bad……………….English .

A. at/ in                             B. in/ at                        C. at / to                           D. at / at

5. Where were you last Sunday ?

A. by taxi                         B. it’s Nam Dinh province          C. at school        D. two years ago

6. Will Nam be at school tomorrow ?

A. Yes, she is.                 B. Yes, he will.             C. She is .                          D. Yes, he is going.

7. We ………….. and ……………at the party yesterday .

A. sing/ dance                  B. sang/ danced              C. sings/ dances            D. sang/ dance

8. What is ………favourite colour ? I like red.

A. his                               B. her                               C. you                          D. your

 

9. …………………………………………? It’s Mrs Lien .

A. What subjects do you have today?                   B. How many pencils are there ?

C. Who is your English teacher ?                         D. Is she at school now ?

10. At school, we learn ………a lot of things.

A. in                                 B. at                        C. to                             D. about

11. He likes playing sports …………football and tennis.

 A. such as                       B. such like             C. sample                    D. example

12. What is Tam like ? ……………………………. .

A. She is cruel                 B. She is gentle and kind              C. She is brave      D. She is generous

13. The monkeys swing …………………….. from tree to tree .

A. loudly                        B. beautifully            C. quickly                  D. quietly

14. I went to my hometown ………………..motorbike .

A. by                               B. for                         C. at                            D. to

15. . His father always ………….coffee for breakfast.

A. drink                         B. drinks                    C. is drinking              D. are drinking

16. What foreign …………….do you have at school?

A. subject                     B. song                       C. language                 D. book

17. They would like some milk……….. dinner.

A. in                              B. at                          C. for                           D. of

18. How do you …………….. listening? – I watch English cartoons on TV.

A. practise                    B. learn                     C. want                    D. have

19. Where …………you usually…………..in the evening ?

 A. do / go                 B. are / go                    C. are  / going             D. do / going

20. When I see a new word, I try to guess its …………………

A. name                    B. vocabulary               C. meaning                 D. language

21. In ………………………….we learn how to use a computer.

A. science                 B. Music                     C. IT                            D. PE

22. How…………..do you brush your teeth ?

A. many                    B. often                         C. old                       D. time

23. He practices ……………English by ………………cartoons on TV .

A. Listening/ watching         B. listen / watch       C. watching/ listening      D.listens/ watches

24. The boy ……………….his teacher some beautiful flowers.

 A. like to give                     B. like giving            C. likes gives             D. would like to give

25. They write emails to _____ other every day.

A. every                                B. each                 C. one                      D. they

1
21 tháng 7 2023

1) B      2) B     3) C      4)D      5) B     6 )B       7)B      8) D     9 ) C          10) A    11) B     12) B     13 ) C     14) A     15) A    16 ) C    17 ) C            18) B    19) B     20)D      21) C      22)B      23)A      24) B   25) B                  đây nhé bạn !!!

33. “ I’ll come and see you as soon as I can” 34. “ You should practice speaking Enghlish everyday” said my teacher. 35. She said to her son “ Go straight upstairs and get into bed” 36. The lifeguard said “ Don`t swim out too far, boys” 37. He said to Huong “ Could you give me a hand, please ?” 38. The traffic police said “ Show me your driving licience, please” 39. Nien asked Hoa “ Do you have many new friends ?” 40. They said to us “ You must go now” 41. I...
Đọc tiếp

33. “ I’ll come and see you as soon as I can”
34. “ You should practice speaking Enghlish everyday” said my teacher.
35. She said to her son “ Go straight upstairs and get into bed”
36. The lifeguard said “ Don`t swim out too far, boys”
37. He said to Huong “ Could you give me a hand, please ?”
38. The traffic police said “ Show me your driving licience, please”
39. Nien asked Hoa “ Do you have many new friends ?”
40. They said to us “ You must go now”
41. I asked Nam “ Are you free tonight ?”
42. The visitors said “ Can we take photos ?”
43. She said “ Do you know the way to the station ?”
44. “ Will I finish my exercise at home ?”
45. She said “ Can you speak Chinese, Minh ?”
46. “ how old is your grandpanrent ?” the girl said.

47.They said “Who are you going with tomorrow ?”
48. “ Do you want to visit Great Wall in China, Tam ?”
49. “ Are you from Canada?” I said to the tourist.
50. “ Send me a postcard when you arrive in Paris” I said to Lan.
51. “ Why is she crying ?” Thu asked Hoa.
52. “ When do your children go wsimming ?” Mrs Ly said.

2
21 tháng 7 2023
  1. "I'll come and see you as soon as I can," he/she said.
  2. My teacher said, "You should practice speaking English everyday."
  3. She told her son, "Go straight upstairs and get into bed."
  4. The lifeguard said, "Don't swim out too far, boys."
  5. He asked Huong, "Could you give me a hand, please?"
  6. The traffic police said, "Show me your driving license, please."
  7. Nien asked Hoa, "Do you have many new friends?"
  8. They told us, "You must go now."
  9. I asked Nam, "Are you free tonight?"
  10. The visitors asked, "Can we take photos?"
  11. She asked, "Do you know the way to the station?"
  12. "Will I finish my exercise at home?" he/she asked.
  13. She asked Minh, "Can you speak Chinese?"
  14. The girl asked, "How old is your grandparent?"
  15. They asked, "Who are you going with tomorrow?"
  16. I asked Tam, "Do you want to visit the Great Wall in China?"
  17. I asked the tourist, "Are you from Canada?"
  18. I told Lan, "Send me a postcard when you arrive in Paris."
  19. Thu asked Hoa, "Why is she crying?"
  20. Mrs. Ly asked, "When do your children go swimming?"
21 tháng 7 2023
  1. "I'll come and see you as soon as I can," he/she said.
  2. My teacher said, "You should practice speaking English everyday."
  3. She told her son, "Go straight upstairs and get into bed."
  4. The lifeguard said, "Don't swim out too far, boys."
  5. He asked Huong, "Could you give me a hand, please?"
  6. The traffic police said, "Show me your driving license, please."
  7. Nien asked Hoa, "Do you have many new friends?"
  8. They told us, "You must go now."
  9. I asked Nam, "Are you free tonight?"
  10. The visitors asked, "Can we take photos?"
  11. She asked, "Do you know the way to the station?"
  12. "Will I finish my exercise at home?" he/she asked.
  13. She asked Minh, "Can you speak Chinese?"
  14. The girl asked, "How old is your grandparent?"
  15. They asked, "Who are you going with tomorrow?"
  16. I asked Tam, "Do you want to visit the Great Wall in China?"
  17. I asked the tourist, "Are you from Canada?"
  18. I told Lan, "Send me a postcard when you arrive in Paris."
  19. Thu asked Hoa, "Why is she crying?"
  20. Mrs. Ly asked, "When do your children go swimming?"