- The essence is the same as binary
- Binary: reverse by bit, then ➕1
- Hexadecimal: Subtract the complement/source from the full F number with the same number of digits, then ➕1
- Eg:
- Complement r1 = FEH
- FF-FE=01
- 01 ➕ 1 = 2
- The value is 2 in decimal notation
- Source r3 = 9
- FFFF-9=FFF6
- FFF6+1=FFF7