There are 12 large cells and 60 small cells on the clock face, and each large cell has 5 small cells. Clockwise walk 1 square is 1 hour, minute hand walk 1 minute, minute hand walk for 5 minutes. Clockwise 1, minute hand 1, minute hand 1, second hand 1.

Knowledge points about clocks and watches in primary school mathematics;

Clockwise and counterclockwise: Observe the rotation direction of the clock hands. The direction of pointer rotation is called clockwise, and the opposite direction is called counterclockwise.

Hour hand and minute hand: the short one is the hour hand and the long one is the minute hand.

Scale: the number 12 divides a circle into 12 squares to identify the scale pointed by the hour hand and record the hours; Small lines or dots divide a circle into 60 squares to identify the scale pointed by the minute hand and record the minutes.

Two scale relationships: when the hour hand turns, it is 12 scale number, that is, 12 hour; When the minute hand turns, it is 60 scale points or small lines, which is 60 minutes. So there are five dotted lines between the two numbers, and it takes five minutes for the minute hand to go through a digital scale.

The hour hand is related to the minute hand: the minute hand makes a circle and the hour hand makes a digital scale. That is, one hour equals 60 minutes.

The relationship between clock and time: the clock is one of the tools to record time. Clocks and watches can adjust speed, time or stop. But time will not stop and cannot be adjusted.