I am trying to solve the following problem. It is not homework since I am just brushing up =) but I will try posting it here. I have the following base 14 subtraction problem: 35 - AB = ? I can look up the answer, which is shown as 68 (base 14). But, for the life of my, I can figure it out... The problem I am having is that AB appears to be larger (?) than the 35? How do I subtract a larger number, from a smaller, and not end up with a negative number? I can figure out the first digit (8). Since B is larger, we gotta carry over from the 3A column, and we end up with 14+5 (=19) - B (=11), so we end up with 8. I get confused in handling the other column, which should now read 3 minus A (and the carried over 1). How does that turn into six? thank you.