You have to crush the balls. Adderal is sustained(extended)-release mixed amphetamine salt, this means that when you take them orally the balls slowly release amphetamine into your body. When you crush them and snort them, more of the substance will be absorbed in a shorter amount of time which gives you a mild to moderate rush.

If you were to take 5 20mg Adderal pills you are giving your body 100mg total of amphetamine, but it would be absorbed slowly all day long. If you snort 40-50mg you get more at once and a rush.