Basic was understood as those skills that were basic, main, essential, and complementary were all other skills complementing elementary.
Se entiende por básico lo que sirve de base fundamental, principal o esencial, y por complementario lo que sirve de complemento a lo elemental.
Entendeu-se por básico o que serve de base, fundamental, principal, essencial e por complementar, o que serve de complemento ao elementar.