Answer:
Number of years between 551 bce and 850 ce = 1,401 years
Step-by-step explanation:
bce stands for : Before Christ Existed
ce stands for : current Era
When calculating dates, if the ending is the same, subtraction of the dates is done, whereas, is the endings are different, the dates are added.
We will compare the dates to a number line, where ce(current era) is on the right hand side and bce (before christ existed) is on the left hand side:
Difference = +850 - (-551)
= +850 + 551 = 1,401 years
This is because from the Before Christ Period, the dates counted down to zero, and started counting upwards Anno Domini (AD) or Current Era (CE).
Therefore, in this case, the periods are different, hence we will add the dates to get the result.
Difference in years from 551 bce to 850 ce = 551 + 850 = 1,401 years
I attached a picture of the timeline to give you a better understsnding