About Martin Dürst's content re "geteilt"-"gemessen":
When I attended the German school system in approx the 1990s this
distinction wasn't mentioned or taught. (I prefer to not give details
about specific time and place for privacy reasons.) From looking into
textbooks and formula collections at that time I recall not having found
any mention of or explanation for such a differentiation. Given that I
also haven't seen many people use that symbol I would suspect that, for
some time, this was an elementary school thing in Germany. For me, the
symbol ÷ also only ever appeared on calculators. I don't think it
appeared ever in primary or secondary school textbooks I've worked with
and wasn't used for handwritten arithmetic at my schools either.
Stephan
PS: Thank you! You've just solved a mystery for me - something I've been
told about a long time ago by an older person but couldn't find
references for at the time.
