It really depends on how far you wish to progress through the licences and ratings. For a straight-forward PPL there is not really that much mathematics. You will of course need to know how to add, subract, divide and multiply-all of which can be done on a calculator-and know a few basics like: speed=distance / time etc.. But you are not supposed to depend on an electronic calculator (which is why you buy two
), so as part of your PPL training you are taught how to use a Flight computer (basically a slide rule) and this makes it a lot easier.
For CPL's, IR's and anything more advanced, I believe that a better understanding of mathematics is required. Good luck.