The composition of the number of books in the fourth grade must first understand the table.
The order of the numerical table is: unit, ten, hundred, thousand, ten thousand, one hundred thousand, one million, ten million and one hundred million.
Each number represents several numbers. For example, if the number is eight, it means eight hundred. If the number is three, it means three hundred.
The number 30658 means there are three tens, six hundreds, five tens and eight Zhang Yiyuan ones.
Integer bit sequence table: "Number levels: 1 100 million, 1 10,000, 100. Digits: 100 billion digits, 1 00 billion digits, 100 billion digits, 1 00 million digits, 100 million digits,110 million digits,/. Different counting units are arranged in a certain order, and their positions are called numbers. The number of integer digits increases from right to left; The first place is a unit, the second place is ten, the third place is one hundred, the fourth place is one thousand, and so on.
The same number represents different values because of different digits and different counting units. For each number, there should be a counting unit. There are infinite natural numbers. Every natural number has an independent name, which is very inconvenient and impossible to read. In order to solve this problem, people have created a counting system, which is the decimal counting method we use.