I'm not sure what you are asking. Your keyboard doesn't have a number pad. Those are usually on the right side, such as on a standard keyboard.
Are you asking about how to use the functions of the number keys...that are in orange? If so, you need to hold down the orange FN key, and then press the key, such as F2, to shut off or turn on your wireless adapter.
If neither of my guesses are correct, give more details about what you are trying to do.