Current location - Training Enrollment Network - Mathematics courses - The problem of mathematics time in the second grade of primary school
The problem of mathematics time in the second grade of primary school
1, Xiao Ming was reading at home one afternoon. 10 minutes later, he heard the bell. After reading the book, he looked up at the clock. The hour hand and the minute hand happened to be together. In the process, Xiao Ming heard the bell *** 12. Ask little Yi Ming how long he has been studying? Xiao Ming's clock strikes the time, what time does it strike, and it doesn't strike at all.

2. It's sometime between 9: 00 and 10. After that, the minute hand position of 1 minute is just opposite to the clockwise position of the previous three minutes. What time is it now?

Sometime between 5 o'clock and 6 o'clock, the minute hand is behind the hour hand. After 24 minutes, the minute hand passed the hour hand, and the angle formed by the two hands was exactly equal to the angle formed by the two hands at the beginning. When does it start?

4. Two watches, A and B, get 3 points every 24 hours, and B gets 3 points every 65,438+05 hours. Today, A is aligned at noon 1 2 of 1 and B is aligned at noon 1 of1. When are these two watches exactly at the same time?

There is a strange clock, day and night 16 hours, 80 minutes per hour. The zero point of this strange clock is the same as Beijing time. When this clock shows 10: 50, what is the actual time in Beijing?

6. For a toy clock, every time the hour hand turns, the minute hand turns 16 and the second hand turns 36, and the three hands begin to overlap. How many times do the three needles overlap when rotating clockwise? (regardless of start and end positions)

7. Hu Qiang's watch gains four minutes day and night. Today noon 12, according to the standard time setting. Make an appointment to go to Ma Tao's house at 3 pm (standard time). According to Hu Qiang's watch, it takes 15 minutes to get back and forth between the two houses. In order to arrive at Ma Tao's house on time, according to his watch, when should Hu Qiang leave home?