Another page from the uxn tutorial notes. It explains how to add, subtract, multiply and divide bytes. uxn notes: "It's easier to read the stack horizontally" and kicks a bucket. It also explains how to calculate shorts and makes a dumb joke where two actual shorts are added.
https://assets.merveilles.town/media_attachments/files/107/797/810/415/466/520/original/ce66b2fe3813a2ec.png