Maths Spl

Yes, you can.
One thing important here is: Why would you want to do that?
After studying commerce, growth of commerce is huge.
But if your interest lies in science then you might shift. Why most of the people go for an MBA post engineering, B.Sc, science courses, etc. The answer is accounting, marketing, financial education is the key to understand any business.
It is good that you have studied the basics in commerce. If this has made any interest in you do stick to commerce for higher studies.
Else, yes you can opt for B.Sc but the cut-off for any college will be higher for you than the science folks in this case.
Try to make your decision considering various factors. Your interest, aspirations, what you expect from your life and job. How will this make you achieve your goal in the long run, etc.
All the best!

Following are the opportunities for Maths graduates:
(a) Higher studies to become theoretician Mathematician and the teach & do research.
(b) Work as mathematics and statistic expert in the field of economics, social sciences, physical sciences, life sciences and earth sciences
(c) Data Modeller
(d) Computer Software engineer
(e) Operational Research Analyst
(f) Gain domain expertise in BFSI, Heath care etc and become analyst
(g) Appear for Indian Economics Services or Indian Statistical Services, Civil Services examination conducted by UPSC
(h) Appear for CDS examination to join Defence services
(I) Appear for Assistant Commandant Examination to join paramilitary forces
(j) Appear for PO to join Public sector banks.
(k) Do BEd to become TGT
(l) Higher studies such as M.Sc, MBA, etc.