Analysis:

1. There are 12 numbers on the clock, and each number represents a large grid. The circle is a circle with an angle of 360 degrees, so each large grid is: 360 ÷ 12 = 30.

2. There are 12 big cells on the clock, each big cell has 5 small cells, and 12 big cells have ***60 small cells, so the angle of each small cell is 360 ÷ 60 = 6.

Extended data

1, time unit conversion relation:

(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).

2. The angle relationship between the hands 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.