R-ary refers to every R-ary 1, that is, it is enough to move forward one bit. For example, we often use decimal system, that is, every r goes into 1. Example: 3+4=7, less than 10. If you don't carry it, it is equal to 7. R is actually an integer, such as R=2 (binary), R=8 (octal) and R= 16 (hexadecimal). R has a wider range and can be any positive integer, which means that the binary number enters one every time.