2. The century is one more year than it is. A century is 100 year. A century is to add one to a year divided by the last two digits.

For example, 2000 is 2 1 century, and 400 is the 5th century.

2000-2099 is 2 1 century, and 1900- 1999 is the 20th century.

3. The year is the decimal number of a year, the year is 10, the year is the penultimate place of a year, and then ten is called decimal. But the penultimate number is zero or a moment, which cannot be called1900s or1910s. ..

For example, 20 18 is 2 1 century 10 year, and 479 is the 1970s.

Extended data:

Century refers to the unit for calculating age. A century is a hundred years, which usually means a hundred years in a row.

The name of dividing a century into ten consecutive years is usually applicable to the use of the chronological method. This decade has gone from "... the first 10" to "... the ninth in every century, such as 1990 ~ 1999, which is the 1990s.

References:

Baidu Encyclopedia-Century Baidu Encyclopedia-Year