well, questions involving graphs, tables and calculations can be best done on the qb, imho.
The same way you learn math on school, practicing questions rather than learning theory only.
About gennav; lots of these calc questions can be solved both with a crp5 and with the electronic calculator.
Learn unit conversions and crp5 usage well, and decide which method is better for the question. This will save time on the exam.
Whatever you do, when you don't understand the answer to the question given, get an instructor to explain you or at least look it up in the book.
after all, you paid money for this
Subjects like air law can best be done with a lot of reference to the book imho.
instruments is probably quite straightforward; lots of mach number questions
perfo and fplanning contain questions with graphs that require a lot of prescision with your pencil.