I did not do economics in JC, but my friends who did complained
that it was taught in a very unrigorous manner, i.e. with
incredibly little math. I do think it is an interesting subject,
just that you will probably want to do your own study outside of
the syllabus.
H2 economics are taught with little Maths because the intent of
the syllabus is to emphasize on concepts that are applicable to the
current economics issues.
Maths especially calculus are used in university economics
because it is easier to analyse the effects of a change of the
variables on a given economic situation especially the use of
partial differentiation to analyse the effects of a change of a
variable with other variables remain constant.
With the use of maths in university economics, students can
formulate their own economic model eg the AS-AD model can be easily
modified with a different assumption and the effects can be easily
analysed.