If it was from, say, 10bce/BC to 20bce/BC it would be 10 years.
[The abbreviations can be confusing: "bce" is an abbreviation of "Before [the] Common Era, and "BC" is "Before Christ'' , while 'ce'' is ''Common Era'' and is the same as ''AD''].
However, there is no such year as year ''0'' [or ''zero''], so this Question is actually from 20bce/BC to 1 bce/BC [or 19 years], and from 1ce/AD to 10ce/AD [or 9 years], thus making it a 28-year difference.
Additional Comment:
Whenever doing a numeric range, one must consider 'inclusive vs exclusive' of the range. Usually then, 20 BCE to 10 CE is 30 astronomic years, which doesn't depend upon the Roman calendar error of Pope Gregory the Great's 'Denis the Little.'
There are 500 years between 250 CE and 250 BCE Years that are denoted as BCE are counted backwards until they get to 0 after which years are then denoted as CE and these ones count upwards. This means that to find the difference between these two years, you must first count from 250 BCE to 0 and then from 0 to 250 CE. 250 BCE to zero = 250 years Zero to 250 CE = 250 years Then sum them up: = 250 + 250 = 500 years
The years between are the years from 249 BC to 1BC, and 1AD to 249AD, ie. 498 years.
200 years.
200 years.
800
Remembering that there was no year zero, there were 2119 years between 110 BCE and 2010.
BC is the same as BCE. From 200 BCE to 50BC is 150 years.
There are 500 years between 250 CE and 250 BCE Years that are denoted as BCE are counted backwards until they get to 0 after which years are then denoted as CE and these ones count upwards. This means that to find the difference between these two years, you must first count from 250 BCE to 0 and then from 0 to 250 CE. 250 BCE to zero = 250 years Zero to 250 CE = 250 years Then sum them up: = 250 + 250 = 500 years
There is no time between BCE and CE. When the former ends, the latter begins. In fact, since there is no year 0, the difference is -1 years.
1700
How many years between 1500 CE and 300 BCE
Remembering that there was no year zero, there were 399 years between 200 BCE and 200 CE.