Many people think that the number "0" is insignificant and even has nothing to do with it. As I learn more and more knowledge, I find that the number "0" is very common and plays a wonderful role in life and mathematics. But sometimes it doesn't make sense. In the first grade, the math teacher told us that any number MINUS itself equals "0" (for example, 8-8=0), and then "0" means nothing; "Any number divided by 0 is meaningless." (For example, 8*0=) This is another "conclusion" about "0" that the math teacher said in class. The division we are learning now is to divide a copy into several parts and find out how many copies there are in each part. A whole cannot be divided into 0 parts, that is, "meaningless"; At this time, I will be a little disappointed to see "0", feeling that it is gone, gone, gone. In the second grade, I found that the position, size and pronunciation of "0" in a natural number are different. For example, using three numbers, 0, 1 and 2, can form 102, 20 1, 120, 2 10. In the fourth grade math class, we learned the "0" scale on the thermometer, which is the distinguishing point between the solid and liquid state of water. Water below "0" degree will form ice, and ice above "0" degree will melt into water. Once, the teacher wanted to count the number of mineral water bottles collected by a classmate in our class, and each person had about twenty or thirty. The teacher asked us to count 25 as zero, and the calculation became simple. It turns out that zero can replace any number as the standard. There will be many "0s" in our life. For example, in hotels and some office buildings, we will see a sign on the door of each room engraved with the room number: for example, "Room 605", and the "0" in the middle is because the room number is not enough for two people; For example, if we go shopping in a shopping mall, the price of a commodity is 805 yuan, and the "0" in the middle is removed, then the shopping mall will lose a lot. So in many cases, there is no "0". Calculation 604÷2 was not a quotient at that time, and only "0" could be used to occupy a place. I also looked up a lot of information about "0": "0", as a natural number, is neither a prime number nor a composite number; "0" is the smallest complete square number; 0' is an even number; "0" is neither positive nor negative, and the opposite number of "0" is the history of "0": "0" is an extremely important number, and its discovery is called one of the great discoveries of mankind. "0" was called Jinyuan number in ancient China, which is a very precious number. It is said that the number "0" was invented by Indians in the 5th century. 1202, a businessman wrote an abacus book. At that time, in the East, mathematics was mainly arithmetic. Due to the need of operation, the number "0" was naturally introduced. The number "0" has a long history in China and has been recorded in many documents. With the growth of our knowledge, the meaning of "0" will be more and more. Let's explore the mystery of "0" with wisdom!