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When A walks halfway, B walks the whole process of 1 (1 + 2) = 1 3 B speed, A B speed ratio is (1 2) :( 1 3 * 2) = 3:4 so, A and B meet at the whole distance of B (1 2-1 3) * 4 (3 + 4) + 1 3 = 3 7.
Then the whole journey is 1200 (3 7) = 2800 (meters).
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Let the distance between the two places be x, and the time it takes them to reach the destination from the encounter is t, then the speed of A v1 = 1200 t, and the speed of B after the speed increase v2 = (x-1200) t, considering the distance taken by B before the meeting, it is divided into two sections, that is, before and after the speed, their sum is 1200, and the speed of B before the meeting can be listed, and two sections.
The time taken corresponds to the time taken by A.
Before B speeds up, A takes time to (x 2) v1, and after B speeds up, A takes time to (x 2-1200) v1, so the distance B travels before the speed increase is (v2 2)*(x 2) v1), and the distance traveled after the speed increase is (v2)*(x 21200) v1), the sum of the two distances = 1200, and the equation for x is solved to obtain x = 2800 km.
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The answer is 2800 meters.
Problem solving ideas (it is recommended to draw an itinerary map):
The first question is, where is B speeding up:
When A walks halfway, B doubles the speed, and when A walks halfway, A and B arrive at the same time, so it means that the time before and after B is the same, and the back is twice the speed in front, all of which shows that B is speeding up when walking 1 (1+2)=1 3, that is, when A walks halfway, B walks 1 3 of the whole journey
The second question, the speed of A and B after speeding up:
According to the analysis of the first problem, A walks halfway, and B goes the remaining 2 3, so the speed ratio of A and B is (1 2):(1 3*2)=3:4
The third question is how much distance A and B have traveled after the speed:
The fourth question: How far did B travel in the process of speeding up to the encounter:
Question 5: What fractions of the distance between the meeting point and b is the whole journey:
Journey: 1200 (3 7) = 2800 (meters).
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Summary. Student: Good afternoon<>
If you want to participate in the Math Olympiad, you can consider the following paths:1School Registration:
Many Mathematics Olympiads have an official registration information and entry deadline. You can find these by searching for relevant keywords and sign up as required. 3.
Mathematics Training Institution Registration: Many mathematics training institutions organize mathematics competitions on a regular basis and provide registration services. You can check with your local math training provider if there is a Math Olympiad-related event and sign up.
How to participate in the Mathematics Olympiad.
Hello. Student: Good afternoon<>
If you want to participate in the Math Olympiad, you can consider the following paths:1School Registration:
Many Mathematics Olympiads have an official registration information and entry deadline. You can find these by searching for relevant keywords and sign up as required. 3.
Mathematics Training Institution Registration: Many mathematics training institutions organize mathematics competitions on a regular basis and provide registration services. You can check with your local math training provider if there are any activities related to the Math Olympiad and register carefully.
Hello classmates, I don't know how to ask the teacher.
How to participate in the Math Olympiad?
How to participate in the Math Olympiad?
Classmate <>
To participate in the Math Olympiad, you can do so by following these steps:1Understand the organization of the Olympiad in a nutshell.
The organization of the Mathematical Olympiad may vary from country to country, and you will need to identify the organization in your country, which can usually be found on the official website of the Ministry of Education or the relevant institution. 2.Find out about the registration requirements and timelines.
The registration time and requirements for the Mathematics Olympiad may vary from year to year, so you need to check the official website for specific registration requirements and deadlines. 3.Prepare the application materials for the competition.
It is usually necessary to submit basic personal information, school certificates, transcripts and other application materials, and the specific requirements can be found on the official website. 4.Participate in tryouts.
In your region or country, there are usually one or more rounds of selection that can be passed to advance to the final International Mathematical Olympiad. You need to be prepared with relevant mathematical knowledge and skills to pass the selection. 5.
Participation in the International Mathematical Olympiad. If you pass the selection competition, you can participate in the International Mathematical Olympiad, which is a global competition with contestants from different countries and regions.
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If the sum of two three-digit numbers is 4 digits, then the thousand digits must be 1. That is, Ao = 1, then it is concluded that the horse is equal to 8 or 9, assuming that the horse = 8, then the gram = 6, then the formula is 1 forest 8 + 868 = 1 forest 86, this is not solved. When the horse = 9, the gram is 8, then the formula is 1 forest 9 + 989 = 1 forest 98, and the solution forest = 0, that is, 109 + 989 = 1098
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Horse + Horse = gram.
Lin + g = horse.
Olympic + Horse = Olympic.
Answer: Olympiad = 1098
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The process of participating in the National Mathematical Olympiad is as follows:
1. Register for the competition.
To register for the National Mathematics Olympiad, students need to provide their ID number, school information and other relevant information, which can be operated on the online registration department of the designated examination machine.
2. Preparation for study.
After the registration is successful, students should make up their minds to start reviewing and preparing for the competition, carefully review mathematics according to their actual situation, master the knowledge points of the mathematics syllabus, improve their quick arithmetic ability, focus on theory, and combine exercises to sort out and summarize daily mathematical knowledge, so as to consolidate various foundations.
3. Take the exam.
When the time for the exam comes, students should take the exam on time, complete the answer sheet within the specified time, and submit the paper correctly after checking that the answers are correct, and complete the exam.
4. Get results.
5. The joy of winning awards.
Students who have excellent results in the National Mathematics Olympiad can get the competition certificate and various awards, and experience the joy of participating in the competition!
Olympiad Topic Features:
1. The knowledge points belong to the conventional knowledge points, but the types of questions are very rare, and most students have no way to start at first sight;
2. Strong ingenuity, conventional problem-solving methods do not work, but often the problem-solving steps are relatively simple and the ideas are peculiar;
3. Strong comprehensiveness, multiple different subject knowledge in series in the same topic, high requirements for the comprehensive and flexible application ability of the participants' knowledge points;
4. The time for answering questions is short, and the time for participants to think is limited.
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The Math Olympiad is a math competition.
"Mathematics Olympiad" is the abbreviation of the Mathematical Olympiad. In 1934 and 1935, the former Soviet Union began to hold secondary school mathematics competitions in Leningrad and Moscow, which were named the Mathematical Olympiad, and in 1959 the first International Mathematical Olympiad was held in Bucharest.
As an international competition, the International Mathematical Olympiad is proposed by international mathematics education experts, and the scope of questions exceeds the compulsory education level of all countries, and the difficulty is much more than that of university entrance exams. Relevant experts believe that only 5 percent of children with exceptional intelligence are suitable for learning Olympiad mathematics, and even fewer can pass all the way to the top of the International Mathematical Olympiad.
In recent years, various extracurricular mathematics improvement classes and training classes in our country, which are far higher than the classroom mathematics teaching content, have been named "Olympiad Mathematics", which has gradually departed from the track of Olympiad player selection and highlighted the characteristics of pan-popularization. Although many well-known mathematicians and mathematics educators have issued a call to guard against the deviation of "Olympiad Mathematics", the delicate relationship between "Olympiad Mathematics" results and middle school promotion makes it difficult to stop the expansion trend of "Olympiad Mathematics". All kinds of cup competitions sponsored by schools and groups are highly targeted extracurricular mathematics training, all of which are dressed in the coat of "Olympiad", and it has become synonymous with "Olympiad" by detaching from textbooks and emphasizing skills.
The Mathematics Olympiad is an education and training for winning the Olympiad Mathematics Competition.
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How to participate in the Mathematics Olympiad is as follows:This is a rather rigorous process, starting with the provincial preliminaries in April or May, and then the people who pass the preliminaries participate in the National High School Mathematics Tournament held on the second Sunday of October every year.
Every year, more than 200 students from all over the country participate in the winter camp, generally the top 30 or so are selected into the national training team, and the training team is carried out from mid-March to early April.
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