The DM's I play with, have all the players fill out cards with our stats on them. That way they know what our Attack Bonuses are, then we roll in view of everyone.
However, it still happens, but I would not call it cheating. On occasion, your brain farts and you add the numbers wrong, or forget some bonus/penlty and give the wrong to hit number.
Also uses it so he/dm can roll our spots and stuff, so instead of saying "Everyone make a spot check", and no one makes it but everyone is like, "ah, I will search"
However, it still happens, but I would not call it cheating. On occasion, your brain farts and you add the numbers wrong, or forget some bonus/penlty and give the wrong to hit number.
Also uses it so he/dm can roll our spots and stuff, so instead of saying "Everyone make a spot check", and no one makes it but everyone is like, "ah, I will search"