nasty math

The teacher's aide in my classroom is leaving us to pursue a career more in line with her interests. She is 19. She told me that her mother is interested in applying for a job in the school system. I asked, "Is she interested in the position you're vacating?"
She replied:

"No, because she can't do the math either. I mean like she knows the basics, but she doesn't like get all nasty with the math."