No, you don't need a hyphen. It would be 10 decades or ten decades.
1 decade = 10 years 10 decades = 100 years Today is 2010. 10 decades ago, it was 1910 .
Its 10. 10 decades = 1 century.
10 decades in 1 century
Decade is a period of 10 years 103 divided by 10 = 10 decades
There are 10 decades in a century. Therefore, 3.5 centuries is equal to 3.5 x 10 = 35 decades.
10 Millennium = 1,000 Decade = 10 10 decades = 100 So 1,000 / 100 = 10
8 times 10 years make 80 decades because 10 decades tines 8 decades will equal 80. (Hint:10 decades equals 1 year.)
A score is 20 years. A decade is 10 years. So in 10 decades we've had 100 years. Thus there are 5 scores in 10 decades. 10 Years/1 Decade x 10 Decades ÷ 20 years/1 score = 5 scores
A score is 20 years. A decade is 10 years. So in 10 decades we've had 100 years. Thus there are 5 scores in 10 decades. 10 Years/1 Decade x 10 Decades ÷ 20 years/1 score = 5 scores
74/10 = 7.4 decades
There are 10.6 decades. Or 10 decades plus 6 years.