468 * a = 96876 a bằng mấy ? vs cần gấp
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PT
3
SM
9 tháng 8 2021
468a = 96876
\(\Leftrightarrow\) a = 207
Vậy a là 207 .
#Songminhtử
C
1
H9
HT.Phong (9A5)
CTVHS
24 tháng 6 2023
a) \(\dfrac{4}{6}+\dfrac{7}{13}+\dfrac{17}{9}-\dfrac{8}{9}+\dfrac{14}{6}+\dfrac{19}{13}\)
\(=\dfrac{2}{3}+\dfrac{7}{13}+\dfrac{17}{9}-\dfrac{8}{9}+\dfrac{7}{3}+\dfrac{19}{13}\)
\(=\left(\dfrac{2}{3}+\dfrac{7}{3}\right)+\left(\dfrac{7}{13}+\dfrac{19}{13}\right)+\left(\dfrac{17}{9}-\dfrac{8}{9}\right)\)
\(=\dfrac{9}{3}+\dfrac{26}{13}+\dfrac{9}{9}\)
\(=3+2+1\)
\(=6\)
b) \(\dfrac{328}{435}\times\dfrac{468}{432}\times\dfrac{435}{164}\times\dfrac{432}{984}\times\dfrac{164}{468}\)
\(=\dfrac{328\times468\times435\times432\times164}{435\times432\times164\times984\times468}\)
\(=\dfrac{328}{984}\)
\(=\dfrac{1}{3}\)
T
1 tháng 10 2023
\(a)245^2+490\cdot54+54^2-199^2\\=(245^2+2\cdot245\cdot54+54^2)-199^2\\=(245+54)^2-199^2\\=299^2-199^2\\=(299-199)(299+199)\\=100\cdot498\\=49800\\---\\b)356^2-356\cdot246+123^2-133^2\\=(356^2-2\cdot356\cdot123+123^2)-133^2\\=(356-123)^2-133^2\\=233^2-133^2\\=(233-133)(233+133)\\=100\cdot366\\=36600\)
\(---\)
\(c)468^2-412^2-110\cdot412-55^2\\=468^2-(412^2+110\cdot412+55^2)\\=468^2-(412^2+2\cdot412\cdot55+55^2)\\=468^2-(412+55)^2\\=468^2-467^2\\=(468-467)(468+467)\\=1\cdot935\\=935\\---\)
\(d)615^2+250\cdot615+125^2-540^2\\=(615^2+2\cdot615\cdot125+125^2)-540^2\\=(615+125)^2-540^2\\=740^2-540^2\\=(740-540)(740+540)\\=200\cdot1280\\=256000\)
#\(Toru\)
S
21 tháng 12 2016
Today, i'll tell you about my class recess. The recess lasts for 15 minutes. At recess, my class has a lot of activities. For example, some boys play soccer, play marbles and play tag while girls skip rope. For me, I usually study under the tree. At recess, I like sitting around and reading books reading stories helps I feel more relaxed. The recess of my class is fun and exciting. I love the recess very much because it helps me relax after stressful hours.
7L
13 tháng 3 2017
In the school yard children, every 2 each session details are to recess. A drum up, but as fun loudly urging us quickly run out .... romp.
Wide school yard a few minutes ago that, deserted and quiet suddenly as narrow, not even enough room for noise and hundreds of large and small pupils, from Grades flush profusely as massive streams, multi-colored sharp. Shuttlecock few top men quickly occupied, arrayed, foot stone Thoan, mouth à á call each other, red and blue orbs flying over, fly back, flew up, fly down. Many girls playing jump rope rhythmically and healthy, spinning wire spiraling, undulating dancer with a smile, hair flying in the wind. Original few eagles around women with women, men with men, many of you are playing tag, chasing people who flee flashed bucket to run, the purple ears. Some you like jokes huddled storytelling fun, laughing, with him jumping happily cheered! Many couples holding hands, walking around, talking to small giggle. Some make you curious to look at the fence looking around she sold plots vicious looking sour apricot, deep sweetness. Teacher observations, standing afar off, would also spread the fun out of our joy.
Recess filled with laughter and voices wa also go very fast. A solemn drumbeat sounded. Drumming like a miracle that we had like a hundred silent gradually, rushed into the classroom, the school returned to the air, quiet terrace, its tranquility..
22 tháng 4 2016
g/s 2n+7 chia hết cho n-2
Ta có 2n+7 cia hết n-2
2-2 chia hết n-2 =>2(n-2) chia hết n-2=>2n-4 chia hết cho n-2
do đó 2n+7-(2n+4) chia hết n-2
(=)2n+7-2n-4 chia hết n-2
(=)3 chia hết n-2 => n-2 thuộc Ư(3).............
bn tự lm tiếp nha đến đây chỉ vc lập bả ng gtrị tìm n
22 tháng 4 2016
ta có : 2n+7/n-2=2(n-2)+11/n-2=2(n-2)/n-2+11/n-2=2+11/n-2
Để 2n+7 chia hết cho n-2 thì 11/n-2 phải có giá trị nguyên
=>n-2 phải là ước của 11
=>n-2={-11;-1;1;11}
Ta có bảng
| n-2 | -11 | -1 | 1 | 11 |
| n | -9 | 1 | 3 | 13 |
Vậy n={-9;1;3;13}
VD
4
22 tháng 9 2019
Internet can be considered as one of the greatest inventions of mankind in the 20th century. All of the things that Internet had been given us have never stopped the world from being surprised. With an extremely huge database of information and has been constantly updated every day, it is true to say that the Internet is an ocean of knowledge which is never exhausted. The big men who dominate the Internet including Google, Wikipedia, YouTube, Facebook, Twitter, Instagram etc., and they can satisfy almost all of the curiosity of anyone. We can find almost every information, from society, science, astronomy, geography to methods for cooking, make-up, or even personal information of a person who is completely a stranger to us. Internet provides an effective learning and researching environment if we know how to use it suitably. Besides studying, we can also search interesting resources of entertainment on the websites. Nowadays, most of the entertainment programs are posted online in large numbers, so it will not be difficult for us to find joy for ourselves. In short, the Internet is a powerful assistant for finding and sharing information for people.
22 tháng 9 2019
Internet has made everyone’s life very easy and simple as we no longer need to go outside for paying bill, shopping, seeing movie, business transactions, etc. It has been an essential part of our life means we can say that without it we face lots of problems in our daily lives. Because of its easiness and usefulness, it is used everywhere such as workplace, offices, schools, colleges, banks, education institutions, training centres, shops, railways station, airports, restaurants, hotels, malls, and most importantly at home by each members for different purposes.
Once we take the internet connection by paying money to the Internet Service Provider, we can access the internet facility anytime from any corner of the world for one week or month according to the internet plan we have taken.
From the time internet has come in our life, our world has become changed to a great extent in the positive ways however in the negative ways too. It is highly beneficial for the students, businessmen, government agencies, research organizations, etc. Students can search any needed information for their study, businessmen can deal their business matters from one place, government agencies can do their work in proper time, research organizations can research more and give outstanding results, etc.
23 tháng 7 2019
Câu hỏi của NaAries2k7 - Toán lớp 7 - Học toán với OnlineMath
https://olm.vn/hoi-dap/detail/225277821663.html
Tham khảo nha, bài của mk ở trên link này
Rất vui vì giúp đc bạn !!!
AH
Akai Haruma
Giáo viên
5 tháng 9 2021
Bài 1:
Vì $AQ\parallel BR$ nên $\widehat{PQA}=\widehat{QRB}$ (hai góc đồng vị )
$\Rightarrow \widehat{QRB}=x$
Lại có:
$Q,R,S$ thẳng hàng nên
$\widehat{QRS}=180^0$
$\widehat{QRB}+\widehat{BRC}+\widehat{CRS}=180^0$
$x+2x+75^0=180^0$
$3x+75^0=180^0$
$x=35^0$
\(468xa=96876\)
\(a=96876:468\)
\(a=207\)
468 x a = 96876
a = 96876 : 468
a = 207
ai trên 10 sp k mình nha