Numbers with levels, 10,000 and 100,000, should be read first, then numbers with 10,000, the last 100,000 or 10,000 levels (that is, starting from the high position) should be read according to the first-level method, and finally, 100,000 or 10,000 should be added. The zero at the end of the stage is not read, and the zero in the middle of the stage must be read.

Let two adjacent counting units be A and B, where A is the lower counting unit and B is the higher counting unit. For example, units and tens are adjacent counting units, and tens and hundreds are also adjacent counting units.

According to the definition, the propulsion rate between A and B is: propulsion rate = B/A. Since A and B are adjacent counting units, b=a times 10, that is, b= 10a. Substituting the formula b= 10a into the definition formula of propulsion rate, we get: propulsion rate = 10a/a, and after simplification, we get: propulsion rate = 10. Therefore, in decimal, the series between two adjacent counting units is 10.

The function of counting

Promoting children's counting ability and mathematical thinking ability: Only by deeply understanding what counting is and what counting should be emphasized in learning will it be of great help to promote children's counting ability and mathematical thinking ability. Exercise children's computing ability: By counting, children's computing ability can be exercised by radix method.

Help children to establish mathematical thinking: Counting is an abstract process, and it is a method to train children's ability and cultivate their abstract logical thinking. Help children establish the concept of numbers: by counting, let children have a clearer understanding and understanding of numbers.