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I want to __ to spa
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1 tháng 7 2017
C = 1 + 3 + 5 + ... + 997 + 999
Số số hạng của C là: (999 - 1) : 2 + 1 = 500 (số)
Tổng C là: (999 + 1) x 500 : 2 = 250 000
HN
26 tháng 7 2018
2 canh nha
Từ 1 đến 1000 có 500 số chẵn và 500 số lẻ nên tổng trên có 500 số lẻ.
Áp dụng các bài trên ta có C = (1 + 999) + (3 + 997) + ... + (499 + 501) = 1000.250 = 250.000 (Tổng trên có 250 cặp số)
Cách 2: Ta thấy:
1= 2.1 - 1
3 = 2.2 - 1
5 = 2.3 - 1
...
999 = 2.500 - 1
Quan sát vế phải, thừa số thứ 2 theo thứ tự từ trên xuống dưới ta có thể xác định được số các số hạng của dãy số C là 500 số hạng.
Áp dụng cách 2 của bài trên ta có:
NT
31 tháng 8 2021
1. Chọn đáp án đúng:
1.1. I want……………….early tomorrow morning.
A. to leave B. leaving C. me leave D. me leaving
1.2. Let me……………….from you soon.
A. to hear B. hear C. hearing D. heard
1.3. May I suggest you let……………….
A. Mary doing so C. Mary does to
B. Mary do so D. Mary to do so
1.4. She is very glad……………….see you again.
A. in B. with C. to D. for
1.5. She suggested……………….more books to broaden the mind.
A. to read B. reading C. to reading D. read
PT
29 tháng 4 2021
1. I love going to the beach but I …………….of sunburn.
A. am afraid B. am not afraid
2. My brother doesn't want to suffer from toothache, so he…………….his teeth twice a day.
A. brushes B. doesn't brush
3. My friend wishes to become a doctor one day, so…………….
A. he studies very hard
B. he wants to work in his hometown's hospital
4. My friend wishes to become a doctor one day,…………….he wants to work in his hometown's hospital.
A. and B. so
5. My father is angry with me, so…………….
A. he doesn't say a word to me B. he still takes me to the park
6. I will go shopping with my mom tomorrow but…………….
A. I will buy some new clothes B.I won't buy anything
7. Louis is my closest friend and…………….
A. he is my co-worker B. I don't want to talk to him now
8. ……………or you will be frozen.
A. Wear thick clothes B. The weather is cold outside
9. Tim is in hospital, so…………….
A. the doctor is taking his temperature
B. he can't go to school today
10. Tim is in hospital…………….the doctor is taking his temperature.
A. and B. but
MN
29 tháng 4 2021
II. Grammar
1. Chọn đáp án đúng
1. I love going to the beach but I …………….of sunburn.
A. am afraid B. am not afraid
2. My brother doesn't want to suffer from toothache, so he…………….his teeth twice a day.
A. brushes B. doesn't brush
3. My friend wishes to become a doctor one day, so…………….
A. he studies very hard
B. he wants to work in his hometown's hospital
4. My friend wishes to become a doctor one day.…………….he wants to work in his hometown's hospital.
A. and B. so
5. My father is angry with me, so…………….
A. he doesn't say a word to me B. he still takes me to the park
6. I will go shopping with my mom tomorrow but…………….
A. I will buy some new clothes B.I won't buy anything
7. Louis is my closest friend and…………….
A. he is my co-worker B. I don't want to talk to him now
8. ……………or you will be frozen.
A. Wear thick clothes B. The weather is cold outside
9. Tim is in hospital, so…………….
A. the doctor is taking his temperature
B. he can't go to school today
10. Tim is in hospital…………….the doctor is taking his temperature.
A. and B. but
QT
Quoc Tran Anh Le
Giáo viên
2 tháng 8 2023
1. Vicky, our parents want to talk to _____about your study.
A. their B. you C. your D. it
2. My dog is playful, and I usually play with _____
A. me B. you C. them D. it
3. Tom and Sandy are my friends. I often go to school with ______.
A. us B. you C. her D. them
4. Where is Jake? Why didn’t you invite ____to the party?
A. me B. you C. him D. her
5. My parents gave _____ a new digital camera. I love ______ so much.
A. me/ it B. you/them C. them/ it D. it/ them
6. The book you gave me is interesting. I really like _______.
A. me B. you C. us D. it
7. Bill is thin, but her sister is thinner than ______.
A. me B. us C. him D. them
8. She is caring, so everyone likes ____.
A. her B. you C. them D. him
9. Can you pass ____the tomato sauce, please? I need some for my pizza.
A. me B. you C. him D. us
10. We are going to the hairdresser/s. Will you go with _____?
A. me B. you C. us D. them
KY
6 tháng 8 2021
Chọn đáp án đúng nhất điền vào chỗ trống
1. She talked to her friends ___________ her vacation in Da Lat.
a. about b. on c. with d. for
2. I want you to meet an old friend of ___________.
a. me b. mine c. I d. my
3. Hoa thinks that sewine is a ___________ hobby.
a. favorite b. friendly c. useful d. interest
4. Her job is to cut, wash and shape people’s hair. She is a ___________.
a. haircutter b. hairdresser c. hairmaker d. hairshaper
5. She learned how ___________ a sewing machine first.
a. use b. to use c. using d. used
6. The earring's were a ___________ from my aunt.
a. gift b. hobby c. poster d. material
7. What ___________ children!
a. a naughty b. an naughty c. the naughty d. naughty
8. Where ___________ after work yesterday?
a. you went b. you did go c. did you went d. did you go
9. I am going to the _________ center.
a. amuse b. amusing c. amusement d. amused
10. Nam often _________ about half an hour a day playing computer games.
a. takes b. wastes c. spends d. gets
11. Group play helps children develop _________ skills.
a. careful b. social c. useless d. regular
RI
6
27 tháng 4 2018
1999/9995
=1999:1999/9995:9995
=1/5
Tìm ước.chung của hai số để rút gọn. Nếu không còn ước chung thì phân số đó tối giản
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