If you want you can, but usually as you cover topics you should list the definitions for each topic then instead of all at the beginning you do not want it to seem like it is a lot.
“Hexadecimal uses digits that more closely resemble our usual base-10 counting system and it's therefore easier to decide at a glance how big a number like e7 is as opposed to 11100111. Higher information density. With 2 hexadecimal digits, we can express any number from 0 to 255.”
