1 00000 is100000. The four zeros after 65438+ million written as 10 are 100000. 10 65438+ million is equivalent to10 *100000 =1000000 =100000. (10 65438+ million, that is,/kloc-0 65438+ million, equal to 10 times 65438+million). The decimal counting method is characterized by "full 10 into one". In other words, every 10 unit forms a higher unit adjacent to it.

Introduction to decimal system

Human arithmetic uses decimal system, which may be related to the fact that human beings have ten fingers. Aristotle said that the universal use of decimal system is only the result of an anatomical fact, that is, most people are born with 10 fingers. In fact, in the writing numeration system independently developed in the ancient world, except that the cuneiform numerals of Babylonian civilization were in the 60-decimal system and the Mayan numerals were in the 20-decimal system, almost all of them were in the decimal system. However, these decimal notation systems are not bitwise.

According to Oracle Bone Inscriptions, Shang people had learned to memorize any number within100000 with the words "1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 100, 1,000 and 10,000". Now the largest number that can be confirmed at that time is 30000. Oracle Bone Inscriptions also has the concepts of odd number, even number and multiple.

Decimalization is an outstanding creation of China people, which is of great significance in the history of mathematics in the world. Professor Needham, a famous British historian of science, once spoke highly of the notation of Shang Dynasty in China. "Without this decimal system, it is almost impossible to have our unified world now." Needham said: "Generally speaking, the number system of Shang Dynasty is more advanced and scientific than that of ancient Babylon and ancient Egypt."