Chapters 18, 19 and 20 (measurement, geometry, and statistics) These topics are covered in your classes and it will be on the exam though it is covered more heavily in class.
Feel free to go by the School of Education and pick up your old tests to study from.
Do some of the Error Patterns in Computations problems. There will be similar problems on your exam.
Register for an account with Learning Express and search for Praxis 7813. There are 2 Praxis practice tests to work through.
For students who have access to 240 Tutoring, there is a course available for the Praxis Elementary Math licensure exam (Praxis 7813). It contains a diagnostic assessment, modules for math topics that may be helpful, and a practice test. You must completely study materials in order to access the practice test.