12
119
1971
-232
Let's say that you're 25 this year, which is 2010. You subtract the year by how old you are. 2010 -0025 ------- 1985 You'd have to be born in 1985 to be 25 years old right now.
26
83
-3990
You would use a - to subtract a number on a spreadsheet
4002
To figure this out, simply subtract 2010 by 1943.2010-1943=67
1600 bc is -1600. 2010-(-1600) = 2010 + 1600, so the difference is 3610 years
4008