I'm no STEM major, so I may be way off, but this is how I see it.

V = IR isn't math. It's a way of defining the relationship and outcome of two specific physical qualities. It says that we combine the resistance of a medium ( R) with the current flowing through it (I) into another ~~joint~~ emergent quality we call voltage (V). We do this because it makes our understanding of the physical world easier to manage since this relationship has helpful applications.

Math is simply patterns in the relationships of quantities. It excludes any physical units or qualities. In other words, math is the art of counting.