[userbinator]

In my experience, I've seen a lot of students entering CS not comfortable with even basic arithmetic and algebra, despite it not being mentioned in any of the linked responses.

As for calculus, I think its importance is overrated - unless you are specifically doing some numerical computation that requires it.

[Bahamut]

Calculus gives you some of the intuition for figuring out a good big O bound for the computing time of an algorithm.