hexadecimal plus subtractive :

hexadecimal plus subtractive is actually pretty simple. It's easy to remember the number of decimalism in the hexadecimal letter. Remember A(10),B(11),C(12),D(13),E(14),F(15).

However, due to the inertia of thinking, sometimes we often make the mistake of looking at more than one digit because letter represents decimalism number. for example, A is regarded as 11, B is regarded as 12, so we must remember that A is 10, not 11. Note that the other letter values for number are the same.

Now let's start talking about hexadecimal plus subtractive, hexadecimal plus subtractive is the same algorithm as decimalism plus subtractive, just remember a few key points, If you take 6AE9H+4B7CH, the first number is number 9+C(12) = 21, and you get Results≥16's like this, you subtract 16 from the Results, and then you add one digit to the first number, so the Results are 5, E(14)+7=21, the first one, so Results is 22, subtract 16 is 6, then the first one, A(10)+B(11)=21 The first one, so Results is 22, subtract 16 is 6, then the first number is 6+4=A(10), So the result is B(11), so 6AE9H+4B7CH=A665H.

hexadecimal number subtractive, but notice that if the number is not decreasing enough, I'm going to borrow a digit from the previous number and the number is not going to be 10, it's going to be 16, for example, 4-9 is not decreasing enough, Borrow one from the front, not 14-9, but 20-9.