một cửa hàng lương thực nhập về 400 bao gao,mỗi bao nặng 50 kg,sau 1 ngày cửa hàng đó bán được\(\dfrac{3}{4}\)
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ta thấy 45=9x5
m618 chia hết cho 5 sẽ có 2 trường hợp
suy ra n sẽ =0; 5
trường hợp 1 n=0
để m6180 chia hết cho9
(m+6+1+8+0) chia hết cho 9
m+15 chia hết cho 9
suy ra m={3}
trường hợp 2 n=5
để m6185 chia hết cho 9
(m+6+1+8+5) chia hết cho 9
m+20 chia hế chho 9
suy ra m={1;7}
vậy m 3 1 7
n 0 5 5
HT
Để m618n \(⋮45\)thì m618n \(⋮9\)và \(⋮5\)
Để m618n \(⋮5\)thì \(n\in\left\{0;5\right\}\)
TH1: Với n=0
Để m6180 \(⋮\)9 thì m+6+1+8+0\(⋮9\)
Hay m+15\(⋮9\)
Mà m \(\le9\)(m là chữ số)
\(\Rightarrow m=18-15=3\left(18⋮9\right)\)
TH2: Với n=5
Để m6185 \(⋮9\)thì m+6+1+8+5\(⋮9\)
Hay m+20\(⋮9\)
Mà \(m\le9\)(m là chữ số)
\(\Rightarrow m=27-20=7\left(27⋮9\right)\)
Vậy các cặp (m;n) tìm được để m618n \(⋮45\)là : (3;0) ; (7;5)
HT


I. Choose the word having the underlined part pronounced differently in each line.
1. A. homework B. judo C. compass D. overseas
2. A. show B. snow C. bowl D. now
3. A. notebook B. love C. above D. Monday
4. A. activity B. creative C. continuous D. international
5. A. surround B. counting C. country D. about
II.
1.have
2.is reading
3.listens/ is looking
4.will receive
5.is playing
6.started
7.guessed/ was
8.am doing
III. Complete the second sentence so that it has similar meaning to the first sentence.
1. Is there a computer room at your school?
Does....your school have a computer room...... ?
2. Both Maths and English are interesting to him.
He is...interested in Maths and English......
3. Hoa's school has more than 500 students.
There.....are more than 500 students in Hoa's school..
4. Janet doesn't watching sports on TV.
Janet is not keen.on watching sport on TV
5. How much time do you spend learning English every day?
How long does....does it take you to learn English everyday.....?
IV. Choose the word having the underlined part pronounced differently in each line.
1. A. chairs B. sofas C. rooms D. sinks
2. A. lamps B. halls C. desks D. lights
3. A. vases B. fridges C. dishes D. tables
4. A. houses B. pictures C. wardrobes D. bookselves
5. A. bag B. family C. bath D. fan
V.
1.B
2.A
3.C
4.D
5.B
VI. Read the following passage and answer the questions below.
Linda is my classmate and she lives in the city with her family. On her street, there are two bookshops, a bakery, a restaurant and a police station. Her house is next to a bookshop. The bakery is between the bookshop and the restaurant. The police station is to the right of the restaurant.
In the neighbourhood, there is a company, a cinema, a museum and a temple. Linda's parents work in the company. Her brother works in the museum.
1. Who does Linda live with?
She lives with her family
2. Where is the bakery?
.The bakery is between the bookshop and the restaurant
3. Where is the police station?
.... The police station is to the right of the restaurant.
4. Is there a bookstore in her neighbourhood?
No it isn't......
5. Where does her mother work?
Her mother works in a company..
VII. Use the words in the box to complete the following passage. Each word is used only once.
big | bookshelf | chairs | clothes | dictionary |
near | newspapers | opposite | right | wall |
This is Nam's room. His room is not very (1)big. There are two (2)…chairs…., a table, a bed, a wardrobe and a (3)…bookshelf..in his room. The table is (4)…near…. the window. There is an ink-pot, some books and an English-Vietnamese (5)…dictionary…..on the table. The bed is on the (6)…right…of the room. There are also some books and (7)……newspapers..on the bed. The wardrobe is (8)…opposite. the bed. Nam has many (9)…clothes… His clothes are all in the wardrobe. The bookshelf is on the (10)…wall... There are many books on it.
VIII. Find a mistake in the four underlined parts of each sentence and correct it.
Example:
O. There isn't two chairs in the living room.
A B C D
Answer: 0. A (aren't/ are not)
1. The cat is among the lamp and the bed. =>between
A B C D
2. There are a cupboard, a dishwasher and a table in the kitchen. => is
A B C D
3. Is there a television front of the microwave? => in front
A B C D
4. There are two bookshelf in my sister's bedroom. =? bookshelves
A B C D
5. I. can see there is a vase behind of the light. => bỏ
A B C D
IX. Use the words given and other words, complete the second sentence so that it has a similar meaning to the first sentence. Do not change the word given. (Use 2-5 words in total).
Example:
O. My house has a small garden.
is There................................... in my house.
Answer: 0. is a small garden
1. The lamp is behind the computer.
of The computer......is in front of.................. the lamp.
2. There is an airconditioner and a ceiling fan in our living room.
Has Our living room.........has an airconditioner and a........ ceiling fan.
3. Peter's house isn't far from the station.
near Peter's house.....is near the........... station.
4. The dog is to the left of the sofa and to the right of the wardrobe.
between The dog........is between the sofa and..... the wardrobe.
5. Tom's bedroom has two bookshelves.
in There...........are two bookshelves......... Tom's bedroom
mình lm từng này đã nha k cho mình vs ạ
ơ sao mà mình làm nó ko hiện lên vậy nhỉ ai giải thích giúp mình được ko

hỏi của hàng đó còn lại bao nhiêu tạ gạo