<p>I just registered for both SAT II Math 1 & 2 but after asking people's opinions, I can just take Math 2. So if I show up on the test day and do only the Math 2 part, will I still be charged for both? </p>
<p>I think you will still be charged for both.
But one thing you can do so you can still get your money’s worth is to just take another test. There’s plenty of other subjects to choose from and you can decide which ones to take at your test center on the day of the test.</p>