|  | 6.2 | Hexadecimal Numbers
| 6.2.5 | Methods for working with hexadecimal and binary numbers
There are two methods of converting binary numbers to hex numbers. The first is to convert binary to decimal, and then convert decimal to hex, using the methods you have already learned. The second method is to use a scientific calculator. It is important that you know how to do decimal, binary, and hexadecimal conversions without a calculator. In this course, the largest decimal number you have to deal with is 255; the longest binary number you have to deal with is 8 bits (11111111); and the largest hexadecimal number is 2 hex digits (FF). You must be able to do these calculations quickly, and do them in your head, both for practical purposes and for your exams.