1, meeting distance = speed x meeting time.

2, meet time = meet distance ÷ speed and.

3. Speed sum = meeting distance ÷ meeting time.

4. Meeting distance = distance A+ distance B. ..

5. The speed of A = meeting distance ÷ meeting time-the speed of B. ..

6. the distance of a = the distance of meeting-the distance of b.

The chasing and meeting problems involved in the movement of two objects on the same straight line or closed figure are usually classified as chasing problems. This kind of problem often appears in exams, and it is a big kind of problem in travel.

Problems in the first volume of mathematics in grade seven

1, encountered a problem.

When many objects are close to each other, we usually find the time of meeting or the whole journey.

2. The problem of running water.

The ship itself is dynamic, even if the water does not flow, it has its own speed, but in the flowing water, it is either pushed by running water or pushed by running water, so that the speed of the ship changes in the running water, while the bamboo raft has no speed, and its speed is the speed of water.

3. Train timetable problem

The length of the train actually has its own length, which is the characteristic of the train travel problem.

4. Clock problem

The clock problem can be regarded as a special problem that two people catch up or meet in a circular orbit, but the two "people" here are the minute hand and the hour hand of the clock respectively. However, in many clock problems, we often encounter all kinds of "strange clocks" or "broken clocks", whose hour hand and minute hand move at different angles from conventional clocks, which requires us to learn to analyze different problems independently.