SICP is used as the introductory CS text at many universities (Berkeley included) and has no official math prerequisites. I think you should try reading it first, and if you get stuck on a concept like Newton's Method, you can just read about it on Wikipedia.
But otherwise, there was basically no math involved, except as simple illustrations. Good luck! It was a great text.
But in case you are additionally interested in further self-education in mathematics related to computer science, or other onlookers in this thread are, I'll recommend some resources in discrete mathematics,
http://www.artofproblemsolving.com/Resources/articles.php?pa...
especially those directed toward the interests of computer scientists.
One book with good online support is the Art of Problem Solving book on Counting and Probability.
http://www.artofproblemsolving.com/Store/viewitem.php?item=i...
MIT OpenCourseware has a mathematics for computer science course.
http://ocw.mit.edu/courses/electrical-engineering-and-comput...
Princeton has posted lecture notes for a similar course:
http://www.cs.princeton.edu/courses/archive/spr10/cos433/mat...
ArsDigita University also posts math-learning resources online:
http://aduni.org/courses/math/
An Amazon guide to books for self-study and an Amazon list of favorite books may also be helpful:
http://www.amazon.com/gp/richpub/syltguides/fullview/R3NMQ39...
http://www.amazon.com/Computer-Science-and-Math-books-that-I...
Your best bet is just to grab a Scheme interpreter and dive in.
They get at somewhat different things, but I suspect that SICP talks about more fundamental ideas than HtDP, and is therefore a better choice if you're only going to read one of them. (If you're reading both, of course, do whatever.)