Contoh Misalkan 4Z = {0, ± 4, ± 8, ± 12,...} Bangun himpunan Z/4Z yakni a + 4Z, a Z diperoleh 0 + 4Z, 1 + 4Z, 2 + 4Z, 3 + 4Z Atau Z/4Z = {0 + 4Z, 1 + 4Z, 2 + 4Z, 3 + 4Z}