The analysis process is as follows:

13: 50-00: 50, (1 1) hours.

00: 50-06: 50, (6) hours.

It can be concluded that the train/KLOC-0 leaves Beijing at 3: 50 and arrives in Qingdao at 6: 50 the next day. Train travel time = 1 1+6= 17 hours.

Extended data:

Algorithm of integer addition and subtraction:

(1) Same-digit alignment;

(2) from the unit;

(3) When it is added to dozens, it will be pushed to a higher position; If the subtraction is not enough, subtract 1 from the high position. When this number is added to 10, it will decrease.

Segmented timing method and 24-hour timing method;

A day starts at midnight 12, and the 24 hours of 1 day are divided into two sections, each of which is 12 hours. From 12 midnight to 12 noon is called the morning, and from 12 noon to 12 midnight is called the afternoon. This timing method is often used in life.

Twenty-four-hour timing method This is the timing method of 0 to 24 hours adopted by radio stations, stations, post offices and other departments. According to this timing method, 13: 00 in the afternoon, 2: 00 in the afternoon 14: 00 ... in the evening 12 is 24 o'clock and the next day is 0 o'clock.

Conversion relationship of time units:

(1) One day = 1440 minutes, 1 hour =60 minutes, 1 minute =60 seconds.

(2) A moment = 15 minutes, and a word =5 minutes (used in southern Fujian and Guangdong).

Angle relation of each pointer of the clock:

(1) An ordinary clock is equivalent to a circle, and its hour hand or minute hand is equivalent to walking 360 degrees.

(2) The angle of each large grid on the clock is 30.

(3) The angle of the hour hand every 1 min should be 0.5.

(4) The angle of minute hand per 1 min should be: 6.