It's a four function calculator! If you haven't taken test yet....my advice is to skip the math questions that you start to find difficult, and go back to them later. My time expired halfway through...
Are you asking about the TEAS 6? If yes, then study the ATI study manual, take the practice tests you purchase, and you will be fine. The other study books for the TEAS 6 have have way too much...
I recently took the TEAS 6. Before I took it, I went on this site to hopefully relieve some of the stress I was feeling before taking the TEAS 6. It was slightly helpful, and I say "slightly" because...