I am a teacher, and I really want to know how to teach the 24-hour timing method in the first volume of mathematics in the third grade of primary school by Su Jiaoban, so that students can learn more solidly. Similarly, in the morning, adding afternoon (12 hours), when it is greater than 12 minus 12, it is equal to afternoon. At that time, when we were studying, everyone made their own Jason Chung. Then the teacher said time, and we moved the hour hand and minute hand on the clock face. The teacher came to check, and there was interaction. Naturally, we learn quickly and remember well.