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You can treat the BC years like negative numbers except that you need to compensate for the fact that there is no year 0 (the year before A.D. 1 is 1 B.C.). If you add to a B.C. year and you get a number greater than -1, add 1 more to compensate for the lack of year 0. For example, to calculate what year was five years after 2 B.C., add five to negative two:

-2 + 5 = 3

Since 3 is greater than -1, add 1 more:

3 + 1 = 4

So A.D. 4 is five years after 2 B.C.

Likewise, when you're subtracting from a positive (AD) year and you get a number less than 1, subtract 1 more for the lack of year 0. For example, to find the last leap year BC, subtract 4 years from the first leap year AD:

4 - 4 = 0

Since 0 is less than 1,

0 - 1 = -1

So the last leap year BC was 1 BC.

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Q: How do you add and subtract ad and bc?
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Related questions

How do you subtract BC and AD?

BC= negative number AD= Positive number


What is BC vs AD?

BC= stands for Befor Christ(count down) AD= stands for nAnno Domini(in the year of the lord) You know when years counted down right? Well that is BC. Then AD is when the years count up. When the abbreviations are the same then subtract(-) if they are different the add(+) 500 BC And 500 AD its 1,000 years! Now do you get it? If you still dont get it.... ASK YOUR TEACHER!


How do you compute the difference between the year BC to AD?

Add the two year values together and subtract 1, to allow for the fact that there was no year zero. So from 1 BC to 1 AD is 1 year. 1 + 1 - 1 = 1. From 10 BC to 40 AD is 49. 10 + 40 - 1 = 49.


How to calculate years using bc from ac?

Take the BC year and add it to the AD year with present year and bc & ad


How do you add BC and AD years?

by copying and paste it


How do you minus BC from AD?

If you are attempting to find the total amount of time, you would add the BC years to the AD years. 1200 BC would be 1200 + 2009 = 3209 years ago.


Do I add the BC year and the actual year than subtract the total from the actual year now to find out the year of the BC TIME times?

no


What is happening when you are using ad to and subtract from selection?

Add to allows you to select area which will be added to selection (already selected area) and subtract is opposite: allows you to subtract portion from already selected area.


Does decrease mean to add or subtract?

wich one


How do you count BC AD?

The last date of BC was 1 BC, then the first date of AD was 1 AD, there was no zero.


Is ad older then bc?

Okay Will AD is older than BC because AD is very old not like BC


What year was it 100000 years ago?

2017 - 100,000 = -97,983 As there was NO year 0 (as zero hadn't been invented when Dennis the Little renumbered the years in what he/we call 531 AD) 1 BC preceded 1 AD and so subtract an extra year → 100,000 years before 2017 AD is 97,984 BC