Watch my video about Modular Arithmetic (9:22). It repeats some of what we did in class Wednesday, but repetition is a tried-and-true method of learning. 🙂

Do the associated practice-sheet (answer key at the back).

If time remains, watch the next follow-up video (17:26). This covers why addition and multiplication are well-defined (in other words, why they “work” mod n).

Don’t forget that if you want to do a logic grade improvement, I’d like your study sheet by Friday.