In a number, the position of each digit is counted from the right: the first digit is unit, the second digit is ten, the third digit is hundred, the fourth digit is thousand, the fifth digit is ten thousand, and so on.

The same number, placed in different positions, represents different numerical values.

For example, 3 means that there are 3 in one bit1; In ten, it means three tens; Take the hundred as the unit, which means three hundred; It means 300 million.

Second, quantity.

The number of digits of a natural number is called the number of digits. The number of digits of a natural number is called the number of digits. One-digit number is a digit, two-digit number is a digit, three-digit number is a digit ... N-digit number is n-digit.

Extended data

Digital classification:

1, a digit (represented by a non-zero digit)

For example, 1, 3, 5 and 7 are all single digits.

2. Two digits (consisting of two digits, ten of which are not zero)

For example,10,24,66,89 are all double digits.

3. Multi-digit (composed of more than two digits, and the highest digit is not zero)

For example, 123 is three digits, 1234 is four digits, and 123456 is six digits.

Baidu Encyclopedia-Numbers

Baidu Encyclopedia-Numbers