I believe that rice, decimeter and centimeter were all learned in primary school, but there is a conversion formula between them. Conversion of meter, decimeter and centimeter: 1 meter =1decimeter = 100 cm. In other words, there is a certain proportion between these units. Meters, decimeters and centimeters are commonly used units of length. Of course, besides calculating the length, we can also measure the height and width. The meter originated in France. As early as 1790, the French Committee suggested that the French meridian length of the earth should be1/40 million as the basic length unit, that is, meters, and decimeters and centimeters, plus millimeters, are converted according to a certain proportion.