There are eight decades in 80 years. A decade is a period of 10 years, so to determine how many decades are in 80 years, you simply divide 80 by 10. This calculation gives you 8 decades in 80 years.
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A decade is 10 years
Ten There are ten years in a decade.
There 10 years in a decade.
1 decade equals 10 years.
A decade is a period of 10 years, honey. So, if you can count to 10, then you can figure out how long a decade is. It's not rocket science, darling.