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.
-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.
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.
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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