1. Draw a text box on white paper.
2. Enter "hours, minutes and seconds" in the text box.
Draw subtitles on both sides, and then add "hours, minutes and seconds" to the subtitle.
4. Add a few smaller branches to the branch, and add relevant content, and the mind map about "hour, minute and second" will be done.
Understanding time, minutes and seconds is a very important content in junior high school mathematics teaching, and it is also a very practical mathematics knowledge. I always follow the idea that mathematics comes from life and is applied to life in teaching.
Although students mainly study the knowledge about time in class, they already have a lot of perceptual knowledge about time in their lives, and feel that our study, life and labor are closely related to time.
Learning point
1, there are three hands on the clock face, namely hour hand, minute hand and second hand, of which the second hand is the fastest and the hour hand is the slowest. The hour hand is the shortest and the second hand is the longest.
2. Measure for a short time, usually seconds. Seconds are smaller units of time.
The longest and thinnest hand on the clock face is the second hand. It takes 1 second for the second hand to walk a small square.
4. Stopwatch: generally used in sports to record time in seconds.
5. Common time units: hours, minutes and seconds.
6. Time units: hours, minutes and seconds, and the forward speed between every two adjacent units is 60.