And the name of a number comes in two forms, ordinary cardinal (שנים, שלושה, ארבעה) (two, three, four) and construct cardinal (שני, שלושת, ארבעת) (two of, three of, four of). And the grammarians call the first type מספר המחובר אל המתואר (a number that is connected to that which it modifies). And they call the second type מספר המופשט מן המתואר (a number that is abstracted from that which it modifies). And they searched for the difference between these two forms, but they could not find one.

And I found that usually the number will come in construct cardinal if it is a known number - whether it is known on its own or through other ways of knowing (for instance, if it was already mentioned; if in its place, if in another place), or there is a reference to another number through which one knows it. And this was also the opinion of the sages of blessed memory.