_+_:_=24
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4 tháng 1
Gọi số học sinh khối 6 là a , a:18 ,a:21 ,a:24 nên a thuộc BCNN ( 18, 21, 24)
21=3.7
18=2.3^2
24=2^3.3
BCNN(21, 18, 24 )= 2^3.3^2.7=504
Vì a chia hết cho 18;21;24 và a thuộc BCNN (24;18;21) nên a=504
Vậy a=504
4 tháng 1
Gọi số học sinh khối 6 là a , a:18 ,a:21 ,a:24 nên a thuộc BCNN ( 18, 21, 24)
21=3.7
18=2.3^2
24=2^3.3
BCNN(21, 18, 24 )= 2^3.3^2.7=504
Vì a chia hết cho 18;21;24 và a thuộc BCNN (24;18;21) nên a=504
Vậy a=504
18 tháng 12 2020
Do phải chia đều để mỗi tổ có số bác sĩ và số y tá lần lượt bằng nhau nên số tổ là ước của 24 và 108, hay là UC(24,108). Mà cần tìm số lớn nhất nên đó là UCLN(24,108)
Ta có:
\(24=2^3.3\)
\(108=2^2.3^3\)
UCLN(24,108)=12
ĐS: 12 tổ
TA
18 tháng 12 2020
Gọi số tổ có thể chia nhiều nhất là \(x(x \in N *)\)
\(U(24) = { 1;2;3;4;6;8;12;24}\\U(108) = {1;2;3;4;6;9;12;18;27;36;54;108} \)
Mà \(24 \vdots x \\ 108 \vdots x \\ \Rightarrow x \in UCLN(24;108)=12\)
Vậy:
Số y tá là: \(108 : 12 = 9 \) (y tá)
Số bác sĩ là : \(24 : 12 = 2\) (bác sĩ)
NN
13 tháng 7 2019
24, if you .....help.............(help) me , i .....will help.....(help) you
25, if they ..........catch.......(catch) the bus , they .........will arrive.....(arrive) on time
26, if my parents.......support........(support) me, i ......will be...........(be) a better person \
27, if it........rains.........(rain), i.........will get......(get) wet
28, Sally and Elizabeth.....will go........(go) out tonight if their parents...........allow..........(allow) it
29, they......will visit........(visit) Eiffel Tower if they.......go........(go) to France
30, if i .......pass.........(pass) the year , my parents...........will give............(give) me a gift
31, if i..........don't pass.....(not/pass) the year, my parents...........will be..........(be) very disa
17 tháng 7 2019
24. help/ will help.
25. catch/ will arrive.
26. support/ will be.
27. rain/ will rain.
28. go/ allow.
29. will visit/ go.
30. pass/ will give.
31. don' t pass/ will be
NN
7 tháng 7 2021
21. I can’t help (laugh) ________laughing________ when I watch Mr Bean.
22. Mr. white didn’t have any money, so he decided (find)to find a job
23. The teacher reminded the students (finish)to finish their assignments in time.
24. My group leader expects me (complete) to complete this paper as soon as possible
25. Our teacher encourages us (use) to use a dictionary whenever we are unsure of the meaning of a word.
26. Before I went away to college, my mother had reminded me (write) to write her a letter once a week.
27. Mrs. Snow has warned her young children (not touch) not to touch the hot stove.
28. The student on the corner pretended (know) to know the answers to the teacher’s questions
29. Residents are not allowed (keep) to keep pets in that apartment building.
30. All applicants are required ( pass)to pass the entrance examination
31. Ann advised her sisters (take) to take the plane instead of driving to San Francisco
32. They tried (avoid) ______avoiding________ (answer) ________answering______ my question.
33. My uncle used (be) ____to be__________ footballer, but he had to stop (play) _______playing______ because of an injury.
34. Mary needs (find) _____to find_________ another job. Her company is going out of business.
35. The teacher told everybody (be) ____to be____quiet, but they just went on (talk) ____talking_____.
36. ‘Do you enjoy (lie) ______lying________ on the beach?’ ‘No. I really dislike (sit) ______sitting________ on the beach all day.
37. We stopped (have) ____having__________ dinner on the way home.
38. I must remember (post) __to post____________ this letter today. It’s important.
39. ‘I’m trying (repair) _______ repairing_______ my radio, but it doesn’t work.’ ‘Why don’t you try (change) ___to change____ the batteries. I think the batteries in the radio need (change) _changing__________
40. Sandra gave up (try) ___trying___to find a job in this country and decided (go) ___to go___ broad.
DT
Đỗ Thanh Hải
CTVVIP
7 tháng 7 2021
1 laughing
2 to find
3 to finish
4 to complete
5 to use
6 to write
7 not to touch
8 to know
9 to keep
10 to pass
11 to take
12 to avoid - answering
13 to be - playing
14 to find
15 to be - talking
16 lying - sitting
17 to have
18 to post
19 to repair - changing - changing
40 trying - to go
DM
1
10 tháng 11 2019
Đáp án: B
Cấu trúc: Help sb with st (giúp ai làm gì)
Dịch: Bố mẹ tôi thường giúp tôi làm bài tập về nhà.
MG
3
DH
3
DT
13 tháng 8 2023
2. My cousin’s bedroom is untidy because he never puts away the clothes.
3. My sister is lazy so she doesn’t do her chores.
4. My aunt helps to feed poor people because she is kind.
5. My uncle is easygoing so I like spending time with him.
0+48:2=24
nhiều lắm
vd như: 23+1:1=24
22+2:1=24
10+28:2=24
..........................