96380:244=
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MN
26 tháng 10 2019
\(\frac{244\times395-151}{244+395\times243}\)
\(=\frac{243\times395+395-151}{243\times395+244}\)
\(=\frac{243\times395+244}{243\times395+244}\)
\(=1\)
15 tháng 8 2016
1. Tall about your school
Talk about your school My school There is a white three-storey building, surrounded by greenery, located at Simei Town Central. That is Simei Primary School. That is also the place where I have schooled for the last five years or so. My school uniform is white. The boys wear a white shirt and white shorts while the girls wear a white blouse and skirt. The uniform must always be worn with the school badge which bears our school motto “Nothing without labor”. It means that we must be willing to work to get our reward. We are also taught to be honest and polite all the time. Most of the teachers in my school are just and kind. However, there are some teachers who show favoritism. As a result, the students who are favored by these teachers are very proud and like to bully the others. In general, however, we all treat one another like siblings and live in harmony. I am sad that I will have to leave my school at the end of this year. It has given me knowledge, friends and happy moments. I will always remember my school and the fond memories it holds. Describe your school. I study in XYZ Secondary School. It is one of the best schools in Singapore. It consists of several Roman style buildings. Our school has all the facilities of a modern school, such as well furnished and airy class rooms, best laboratories, a big library with a huge collection of books, a vast play ground and even a swimming pool. Our school building is situated in the middle. There is motorway leading from the main entrance. The playground is on the left of the motorway and a big garden on the right. When you enter the building, the principal’s room is on the left. They are all well furnished. There are twenty classrooms. Our laboratories are well equipped. The school library has an up-to-date collection of books on many subjects. Our librarian and her two assistants are very helpful. Our school, like other schools, has prescribed a uniform for us. We have to wear white trousers, a white shirt and a black tie. The girls have to wear white shirts and skirts.Our principal is very strict as he pays strict attention to behavior, punctuality and cleanliness. The most well- behaved and punctual student will be assigned as the class prefect. Our principal is a strict disciplinarian. He accepts the help and advice of all teachers. Though our principal is strict, he is fair and loving. He tries to find out the reason and guides us. If one violates any rules, he will be punished. Our principal is very strict in this aspect.Our teachers are also very strict. They teach us with the utmost care, guide us with our assessments and other preparations and help us in times of need. I like my school very much and am proud to be a student of that school.
15 tháng 8 2016
3. Everyone has a dream of his, who are estimated to make pay the army, the Convention as a teacher, the Convention as a pilot. And I also have my dream. My dream is to become a writer.
When I tell people about this dream, many people believe that you're the romantic. A writer would have to have a romantic soul, said observers, emotional life, in harmony with everyone. From childhood I have read books by Nguyen Nhat Anh uncle, great uncle was writing, I was fascinated by how to write simple but affectionate of him.
Then I also want to become a writer, could be going to a lot of places, met many people, visited many places and can start writing. Perhaps when that emotion will very much and I will have work or. If you are a writer, then I'll become a celebrity, is well known, they will have their own books, can bring people come to show off your product.
Because being a writer dreams should from now you must read a lot, write a lot, then this could well be written. I admire writers, poets because they have a spiritual life is very rich. They beauty of life in these pages, and you also want to become like that.
I like freedom, like flying, so I do not like having to sit around. I think as a writer to go much, much new life with the good and meaningful work. I will try harder to be able to achieve his dream.
Whatever path you go there very long but I think if everyone has dreams, try and strive to know, they will surely do. I wanted to write the book about family, friendship, love, life. I will win donated three, gave my mother because they were always beside me, trying to motivate me to study well.
I will try to achieve that dream.
VT
26 tháng 11 2014
a. Xét TG AMB và TG DMC, ta có:
MA=MD(gt); góc AMB=góc CMD(đối đỉnh); MC=MB(M là trđiểm BC)
=> TG AMB= TG DMC(c.g.c)
b. TG AMB= TG DMC=> góc MAB= góc CDM(2 góc tương ứng)
Vì MAB=CDM(cmt), mà chung lại ở vị trí slt=>CD//AB
c. TG AMB= TG DMC(cmt)=>AB=CD(2 cạnh tương ứng)
=>CBA=CDM(2 góc tương ứng)
Xét 2 TG vuông CAB và ACD, ta có:
AB=CD(cmt); CBA=CDM(cmt)
=>TG CAB=TG ACD(cạnh góc vuông-góc nhọn kề)
=>CAB=ACD(2 góc tương ứng)
mà CAB=90o(gt)=>ACD=90o
L
1
NT
6
TP
2
19 tháng 4 2016
224x395-151=223x395+395-151=223x395+224
nên: (244x395-151)/(224+395x243)=1
17 tháng 1
Toán ảo vậy...Lan đua xe đạp chắc số 1 Thế Giới luôn ấy??Thui mình giải cho:
Lan đi số giờ để đến trường là:
500 : 90 = 5,555 = Khoảng 5 giờ 30 phút
Trung bình mỗi sáng ta đến trường vào lúc 6 giờ 45 phút.
Vậy Lan phải đi từ số giờ là:
6 giờ 45 phút - 5 giờ 30 phút = 1 giờ 15 phút ( Sáng) ???Ủa gì zợ
Đáp số: 1 giờ 15 phút
Toán kiểu gì vậy bạn???
TT
1
DD
Đoàn Đức Hà
Giáo viên
21 tháng 7 2021
\(5x-2y=1\)(1)
Có \(\left(5,2\right)=1\)là ước của \(1\)nên phương trình có vô số nghiệm.
Thấy \(\left(1,2\right)\)là một nghiệm của (1) nên nghiệm tổng quát của (1) là:
\(\hept{\begin{cases}x=1+\frac{-2}{1}t=1-2t\\y=2+\frac{5}{1}t=2+5t\end{cases}}\left(t\inℤ\right)\)
\(P=3x+5y=3\left(1-2t\right)+5\left(2+5t\right)=13+19t\)
Dễ thấy \(P\)không có giá trị nhỏ nhất do \(t\inℤ\).
Nếu đổi điều kiện là \(x,y\)là các số tự nhiên.
Ta có: \(\hept{\begin{cases}x=1+\frac{-2}{1}t=1-2t\\y=2+\frac{5}{1}t=2+5t\end{cases}}\left(t\inℤ\right)\)suy ra \(\hept{\begin{cases}1-2t\ge0\\2+5t\ge0\end{cases}}\Leftrightarrow\frac{-2}{5}\le t\le\frac{1}{2}\)suy ra \(t=0\).
Khi đó \(P=3.1+5.2=13\).
= 395
hok tot!