Please do not cite or quote without permission—but feedback is welcome!
- Óscar Pereira, “Sundry Notes on Modular Arithmetic”, unpublished. [preprint]
Abstract. Even back when I was first learning modular arithmetic, I thought most texts explained it in a way that is needlessly confusing. Later on, when I began teaching the subject, I re-encountered the same feeling—especially with non-math majors. This is my attempt at a less confusing explanation.