Question
Write down the addition table for the congruence classes modulo 4 , and the multiplication table for the non-zero congruence classes modulo $5 .$
Step 1
The congruence classes modulo 4 are [0], [1], [2], and [3]. We will add each pair of congruence classes and find the result modulo 4. Addition Table (mod 4): ``` + | [0] [1] [2] [3] ------------------- [0]| [0] [1] [2] [3] [1]| [1] [2] [3] [0] [2]| [2] [3] [0] Show more…
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