In primary school mathematics, there is one knowledge point that is relatively obscure, but it is very important. It's a matter of digits and digits. Among integers, one (one), ten, hundreds, thousands, ten thousand, one hundred thousand, millions, tens of millions, billions, bil

In primary school mathematics, there is a knowledge point that is relatively biased, but it is very important. It's a matter of digits and digits. In integers, one (one), ten, hundreds, thousands, ten thousand, one hundred thousand, millions, tens of millions, billions, billions...etc. are all counting units of integers . When counting, counting units should be arranged in a certain order, and the positions they occupy are called digital . For example, "2" in 2016 is the fourth digit from the right, that is, the digit where "2" is located is the thousands digit.

-digit means that a number is written with several digits (the leftmost number is not 0). The number of digits is the number of digits. or in other words, how many digits a natural number contains is the number of digits. If 2046 contains four digits, then 2046 is a four-digit number.
We have specially discussed some time ago that the smallest one digit is 1, not 0.

According to our country's reading habits, the four-digit grading method is adopted, that is, starting from the ones digit, every four digits are used as a level . The four digits of units, tens, hundreds, and thousands are called the individual level; the four digits of ten thousand, hundreds of thousands, millions, and tens of millions are called the ten thousand level; the billion, billion, and tens of billions places are called Hundreds of billions are called billions, and so on. html has four levels, ten thousand levels, hundreds of millions... called levels.
Current primary school mathematics textbooks and reading and writing numbers usually emphasize four-digit one-level . However, in real life, whether it is counting in banks or information technology, it is usually three-digit one. Level . Because many countries use three-level destiny numbers. In order to be consistent with international customs, our country also stipulates the "three-digit system" for writing numbers. But do not use section marks, but only leave half a number between two adjacent sections.

The above elementary school mathematics knowledge points are the basic knowledge of mathematics, but sometimes, adults can't tell them apart.

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