Mathematics is the language of Economics. Using equations to describe our thinking about markets and other social phenomena assures consistency, does away with ambiguity, and makes mistakes easy to spot. This approach differentiates Economics from several other social sciences. When comparing predictions with empirical reality, economists usually also use the quantitative methods of different branches of statistics, which, in turn, also requires Mathematics to be understood. Thus Maths, for our students is a must.
But ours is not a B.Sc. in Mathematics program: the Maths needed for undergraduate Economics is not too advanced and, as a part of our program, we teach our students the methods used in our courses: every student with stable foundations in high school math and prepared to work hard should be able to learn it.