Math problems have historically comprised ~40% of the points on each exam. While math problems are more time-consuming than notecard problems per point, they comprise far too many overall points to not spend a significant amount of time preparing.
Similar to the lower level exams, at a basic level there are a finite number of computations that are testable from the syllabus. JEP's content database covers all of these several times over, providing you with practice applying the same math concepts in different scenarios, much like a real exam.
To aid with your studying, practice problems are broken down by the following dimensions: