I am a sixth-grade math teacher, and I need Olympiad 1 badly. The distance between b and a is 6 kilometers. Someone walked from A to B, with an average of 80 meters per minute in the first half and 70 meters per minute in the second half. How many minutes did it take him to walk the last half of the journey?
Xiaoming has two roads with the same length from home to school, one is a flat road and the other is a half slope. Xiao Ming takes as much time to go to school by two roads. It is known that the downhill speed is 1.5 times that of the flat road, so how many times is the uphill speed?
The ship went back and forth from place A to place B for two hours. When it came back, it was very smooth, walking 8 kilometers per hour more than when it went, so the second hour walked 6 kilometers more than the first hour. So how many kilometers is the distance between A and B?
4. The starting station and the terminal of the tram line are Station A and bilibili respectively. There is a tram from Station A to bilibili every five minutes, and the whole journey takes 15 minutes. A man started from bilibili and rode to Station A along the tram line ... When he started, a tram just arrived in bilibili and met the oncoming tram 10 on the way. When we arrived at Station A, another tram had just left from Station A. How many minutes did it take him to get from bilibili to Station A?
A and B are swimming in the river, starting from a certain place and swimming in the same direction at the same speed. Now A is in front of B, and B is 20 meters away from the starting point. When B swims to where A is now, A will be 98 meters away from the starting point. Q: How many meters is A from the starting point now?
6. Two cars, A and B, start from east and west at the same time. A travels 56 kilometers per hour and B travels 48 kilometers per hour. The two cars met at a distance of 32 kilometers from the midpoint of the two places. Q: What is the distance between east and west?
7. Li Hua walks from school to the winter camp 20.4 kilometers away at a speed of 4 kilometers per hour. 0.5 hours later, the camp teacher went to meet him when he heard the news, which was 1.2 kilometers more than Li Hua's every hour. After another 1.5 hours, Zhang Ming reported to the camp by bike from school. As a result, three people met somewhere on the road at the same time. Q: How many kilometers do cyclists travel per hour?
The express train and the local train leave from A and B respectively at the same time, in opposite directions, and meet five hours later. It is known that it takes 12.5 hours for the local train to travel from B to A, 0.5 hours for the local train to stop at A, and 1 hour for the express train to stop at B, so how long does it take for the two cars to meet for the first time?
There is a road between the school and the factory. The school sent a car to the factory at 2 pm to pick up a model worker to give a report. Round trip takes 1 hour. The model worker leaves the factory in the afternoon 1 and walks to school. On the way, I met the car that picked him up, got on the bus and drove to school immediately, and arrived at 2: 40 pm. Q: How many times faster is the speed of a car than that of a model worker?
10. It is known that the walking speed of A is 1.4 times that of B. Party A and Party B start from A and B respectively at the same time. If you go in the opposite direction, meet in 0.5 hours; If they go in the same direction, how many hours will it take A to catch up with B?
1 1. The hunting dog found a running rabbit in front of it at 10 meters and immediately ran after it. The rabbit runs 9 steps, and the dog only needs to run 5 steps, but the dog runs 2 steps and the rabbit runs 3 steps. How many meters did the dog run when it caught up with the rabbit?
12. Zhang and Li got on the horse together, started from one place and headed in one direction. Zhang's speed is 4 kilometers faster than Li's and he reaches the second place 20 minutes earlier than Li. When Li arrived at B, Zhang advanced another 8 kilometers. So how many kilometers is the distance between A and B?
13. At 8: 08 am, Xiao Ming started from home by bike; Eight minutes later, my father came after me on a motorcycle and caught up with him 4 kilometers away from home. Then my father went home at once, and went back to chase Xiaoming as soon as he got home. When I caught up with him again, it happened to be 8 kilometers away from home. What time is it now?
14. Tortoise and Rabbit Race10000m, the speed of the rabbit is five times that of the tortoise. When they started from the starting point together, the tortoise kept running, and the rabbit ran somewhere and began to sleep. When the rabbit woke up, the tortoise was 5000 meters in front of it. The rabbit caught up, but when the tortoise reached the finish line, the rabbit was still behind 100 meters. So how many meters did the tortoise run while the rabbit was sleeping?
15. Both a big car and a small car drive from A to B. The speed of the big car is 0.8 times that of the small car. It is known that the bus leaves 17 minutes earlier than the car, but it stops at the midpoint of the two places for 5 minutes before continuing to the second place; After the bus set off, it went straight to B without stopping. Finally, the bus arrived at B 4 minutes earlier than the bus. It is also known that the limousine departs from Party A on 10 in the morning, so how long will it take for the limousine to catch up with the limousine?
I am a math teacher and want to be an art teacher. What gift do you think is better for her? Send her a box of Dove chocolates and put a card in it, and she will know.
I like math. I want to be a math teacher. I like math very much when I write English. I hope to be a math teacher in ten years.
Take it. Thank you; !
I like math, and I want to be a math teacher in ten years.
Math teacher? I have something urgent to find him. Thank you. Do you want to go to a key university? Or take an ordinary undergraduate course.
I'm a senior three, and I'm poor at math in senior one and senior two.
Senior three, take notes carefully in class, and got 102 in math test. Mentors are all clouds. Listening carefully in class is king.
Just find a math teacher who can teach me the sixth grade. 63 1 1 10064 undergraduate students who just graduated from university, if you can help me, I am willing to answer your questions.
The math teacher asked us to do our own problems (the first semester's problems). Can the calculation be an equation? Fill in the blanks: 1. Two straight lines are parallel, the included angle () is equal, the inner angle () is equal, and the edge () is equal.
2. The coordinates of triangle ABC are (1, 2) (-2, 2) and (-2,-1) respectively, and the coordinates of triangle A' after moving are (2, 3), so the coordinates of triangle B'C' are () () respectively.
3. Starting from point A, point B is 65 degrees west of south, which means that the orientation of point A starts from point B ().
Please write the coordinates of a point in the second quadrant ().
5. The distance from point A (-3,5) to the X axis is (), and the distance to the Y axis is ().
Answer: 1. Equality and complementarity II. -1, 3- 1, 0 3. northeast 65 degrees 4 minutes. -2, 1 5.53.
How do math teachers do problems or how do primary schools do problems according to the teaching content, especially the understanding of knowledge? So you will find that every test paper contains all the contents you have learned, some of which are the difficulties and key points of knowledge.
Is there an online math teacher? Ask a math problem. What's the problem? Say it.