Xiao Zhang will go to work in the factory at three o'clock in the afternoon. It's probably time for him to go to work. He went to the house to look at the clock, which had already stopped 12+08. He fo

Xiao Zhang will go to work in the factory at three o'clock in the afternoon. It's probably time for him to go to work. He went to the house to look at the clock, which had already stopped 12+08. He forgot it when he wound it. It stopped for 2 hours and 20 minutes.

Analysis: 1: When he came back from work, the clock ran 21:00-12:10 = 8 hours and 50 minutes. 8 hours and 50 minutes minus 8 hours at work minus 65438+ 00 minutes early equals 40 minutes on the road. One-way time 40 minutes divided by 2 equals 20 minutes.

2. He arrived at the factory at 14: 50 (15 minus 10 minus 20 minutes on the way 14: 50 equals 14: 30. 14: 30-12:10 = 2 hours and 20 minutes, the stop time of the clock.