First Lessons in Maori
When using an ordinal as an adjective in immediate connexion with a noun, prefix tua-* to the simple numeral from one to nine, thus:
Te tangata tuatahi, the first man.
Te tekau o nga manu, the tenth of the birds, or the tenth bird.
Te rua tekau ma toru o nga whare, the twenty-third of the houses, or the twenty-third house.