this is just from my experience at usyd
microeconomics (pre req unit) = abit of linear algebra, teeny bit of calculus and i mean tiny cos it was just simple differentiation of basic equations, abit of basic algebra in re arranging equations and substitution
macroeconomics = err addition and subtraction and basic algebra. I tiny logarithm came up in the equation of money exchange but it's negligable. Im just mentioning it cos it's there
econometrics A = fair bit of maths. Series and sequences for financial maths (the geometric sequence and loan repayments, sigma notation), bit more algebra, natural logs in solving some financial maths stuff, subsitution method...quite basic. I might be forgetting something..
accounting 1A= hmmm can u add and subtract? off you got then! hardly anything. tiny bit of algebra might creep in but it's really hardly needs mentioning cos its nothing
ok, sounds like nothing so far but 2nd and 3rd year units (esp, metrics, finance etc) will have LOTS of maths and they often warn u that knowledge of maths at 3u will be highly recommended. So the idea is that 1st yr subjects won't require it but some subjects/majors really need you to be able to have knowledge of and grasp mathematical ideas quickly..