Nope. You can't have a calculator. I'm horrible at math. However, I definitely practiced a lot of math and it ended up making me improve. I can do a lot of math problems in my head now LOL. The TEAS has a lot of your basic math on it... They don't give you any problem that can't be done on paper.
That is good for you that you did. But that's exactly why the test is not exactly fair. Some people have calculators and some don't some people have periodic tables and some don't. That doesn't exactly give everyone an even playing field.