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How many years is a decade

# How many years is a decade

The answer: a decade is 10 years. Why? It comes from dividing 100 by 10. 100 is 10 tens, and 10 is 1 tenth. We learned from long division that a decade is 10 ten-year periods. But we also learned from discussion that if you are doing long division by 10s, 5 tens, 3 tenths and 2 hundredths, you will get a different answer, which you can get from 2 thousands, 4 ten-thousandths.The milestones of 1 decade, 1 century, 1 millennium are very familiar to everyone because they appear in daily life, appear everywhere. It's easy to come across when you hear phrases like the 19th century, the 1980s, or spend a millennium. So how many years do these milestones represent? Follow the article to figure it out. If you need more specific math help, contact https://domyhomework123.com/.

For example, the statement that "during his last decade, Mozart explored chromatic harmony to a degree rare at the time" merely refers to the last ten years of Wolfgang Amadeus Mozart's life without regard to which calendar years are encompassed. Also, 'the first decade' of a person's life begins on the day of their birth and ends at the end of their 10th year of life when they have their 10th birthday; the second decade of life starts with their 11th year of life (during which one is typically still referred to as being "10") and ends at the end of their 20th year of life, on their 20th birthday; similarly, the third decade of life, when one is in one's twenties or 20s, starts with the 21st year of life, and so on, with subsequent decades of life similarly described by referencing the tens digit of one's age.Particularly in the 20th century, 0-to-9 decades came to be referred to with associated nicknames, such as the "Swinging Sixties" (1960s), the "Warring Forties" (1940s) and the "Roaring Twenties" (1920s).

This practice is occasionally also applied to decades of earlier centuries; for example, referencing the 1890s as the "Gay Nineties" or "Naughty Nand the period from 1990 to 1999 is the 1990s. Sometimes, only the tens part is mentioned (60s or sixties, and 90s or nineties), although this may leave it ambiguous as to which century is meant. However, this method of grouping decades cannot be applied to the decade immediately preceding AD 10, because there was no year 0. A rarer approach groups years from the beginning of the AD calendar era to produce successive decades from a year ending in a 1 to a year ending in a 0, with the years 1–10 described as "the 1st decade", years 11–20 "the 2nd decade", and so on; later decades are more usually described as 'the Nth decade of the Mth century' (using the strict interpretation of 'century'). (Source:en.wikipedia.org)

## Year

A rarer approach groups years from the beginning of the AD calendar era to produce successive decades from a year ending in a 1 to a year ending in a 0, with the years 1–10 described as "the 1st decade", years 11–20 "the 2nd decade", and so on; later decades are more usually described as 'the Nth decade of the Mth century' (using the strict interpretation of 'century'). Historically, 1 Anno Domini (AD) marks the beginning of the Gregorian calendar (note that the Gregorian calendar has no year 0); therefore, the Gregorian calendar first decade depicts the period between 1–10 AD, whilst the second decade is referred to as the period between 11–20 AD. Another view is that a decade starts with the last number as one and ends the year with the last number as 0. For instance, the 10th decade of the 20th century began from 1991 to 1999. Likewise, 2030 will mark the last year of this decade.Technically, the 21st century is marked from January 1, 2001, and ends on December 31, 2100. Starting from the year 2000, the marking of a new era begins known as the 21st century.

As Jan. 1, 2020, approaches, it turns out there is a Team Zero and a Team 1 – those who believe the new decade will begin after midnight on the upcoming New Year's Eve and those who believe the burgeoning celebrations of a new decade (and all the "last decade" retrospectives) are in fact a year early. On this question, many voices of authority are with the minority. They say that because there was no Year Zero when the current era began more than 2,000 years ago, all decades, centuries and millenia begin with Year."The reason people get confused is because we tend to think of decades as 'the 20s' or 'the 30s,' Fienberg says. "It's true that 'the 20s' — that is, the period 2020 to 2029 — is a decade, i.e., 10 years, but in terms of keeping track of decades from a calendrical (rather than cultural) perspective, the decades are counted as noted above."I count from 1 to 10, not 0 to 9," Chester recently told The Philadelphia Inquirer. As an example, he said, "When I turned 50, I told people that I was in the last year of my 40s." (Source:Source:ww.npr.org)

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