Dane here. No one actively thinks of 90 (halvfems, 2 and a half fives) as a mathematical expression. Is is just a word for 90.
So we say 2+90 like Germany.
Would it have been nice if that word meant “9 tens”, yes, but Danish is a just a stupid language where you have to learn a bunch of things by heart unfortunately.
Dane here. No one actively thinks of 90 (halvfems, 2 and a half fives) as a mathematical expression. Is is just a word for 90. So we say 2+90 like Germany.
Would it have been nice if that word meant “9 tens”, yes, but Danish is a just a stupid language where you have to learn a bunch of things by heart unfortunately.