Amḍan, d tagrumma n yiwen neɣ aṭas n yizwilen. Imḍanen d tiɣawsiwin n tusnakt. Leṣnaf n yimḍanen Ṣṣenf ittuseqdacen aṭas d imḍanen N {\displaystyle \mathbb {N} \,} : 0, 1, 2, 3 atg. Asmi yella yimḍanen ibawen (négatifs) am -1, -2 atg, nesɛa imḍanen Z {\displaystyle \mathbb {Z} \,} . Imḍanen Q {\displaystyle \mathbb {Q} } am : 2/3, 4/5 atg. Imḍanen R {\displaystyle \mathbb {R} \,} am : 2 {\displaystyle {\sqrt {2}}} , ln(5) etc. Imḍanen C {\displaystyle \mathbb {C} \,} am : 2i+3, 3i etc. N ⊂ Z ⊂ D ⊂ Q ⊂ R ⊂ C {\displaystyle \mathbb {N} \subset \mathbb {Z} \subset \mathbb {D} \subset \mathbb {Q} \subset \mathbb {R} \subset \mathbb {C} }