даҳ: ten
Онҳо даҳ дона китоб оварданд.
They brought ten books.
Дарс соати даҳ тамом мешавад.
The lesson ends at ten 0’clock.
They brought ten books.
Дарс соати даҳ тамом мешавад.
The lesson ends at ten 0’clock.
Bonus:
Learn the numbers from 1 to 100 on this Tajik Wikipedia page: Шумораҳои ҳисобӣ
The word дона (unit, piece) is a special word, called a classifier, that is used with numbers. Classifiers are often left out when translating into English. Read more about how to use them in this post – дона.