Talk:Commercial minus sign

Right or wrong

In Finland, it is used as a symbol for a correct response alongside the check mark as an incorrect response.

I do not know about Finland, but about Denmark, I'd say

In Denmark, e.g. marking homework, it is used as a symbol for an incorrect response, alongside the check mark for correct responses.

Which (as I read it) is pretty much the opposite.--Nø (talk) 11:16, 4 April 2020 (UTC)[reply]

Odd, that contradicts the source I just added! Unless I seriously misread it, could you check please? It's the Unicode consortium discussion list, so arguably not a 100% RS, but we would need a new source. Could you do some research in Danish because the English language sources won't be as reliable. --John Maynard Friedman (talk) 13:11, 4 April 2020 (UTC)[reply]

Check mark disagrees with you too. So maybe you went through school thinking all your wrong answers were right😁 (Your English is so good, I doubt that is true). --John Maynard Friedman (talk) 13:16, 4 April 2020 (UTC)[reply]

Actually, I've been a maths teacher for 20 years - and I never encountered a student who misunderstood check=it checks out, and ⁒=this is wrong. But I guess I didn't have students from Finland (though from many parts of the World).

Sources. All I have found is this one [1], in Danish, notes that the check that in a computer dialog box and in Danish marking means OK or Correct, in Swedish, Norwegian and Finnish may mean Wrong. In Swedish, R is used for Right, and in Finnish, ⁒. It does not mention that ⁒ is used for Wrong in Danish, but mentions that it is confusing that the Finnish sign for Right looks like a Danish minus (that used to be the obelus, ÷).--Nø (talk) 14:09, 4 April 2020 (UTC)[reply]

I don't think that even Saga Norén could explain how that happened! Feel free to update accordingly, it doesn't matter if the source is not in English. --John Maynard Friedman (talk) 16:51, 4 April 2020 (UTC)[reply]

Examples?

Would it be good to add examples to this article to show how the commercial minus sign is used? For instance, in financial documents, is it used in a similar way that parentheses are used for contra amounts? --MtPenguinMonster (talk) 08:47, 23 October 2023 (UTC)[reply]

Closest readily available is the image at Obelus#In mathematics but that uses a form that looks identical to U+00F7 ÷ DIVISION SIGN.

Maybe you can find Johann Philipp Schellenberg (1825). Kaufmännische Arithmetik oder allgemeines Rechenbuch für Banquiers, Kaufleute, Manufakturisten, Fabrikanten und deren Zöglinge [Commercial arithmetic or general arithmetic book for bankers, merchants, manufacturers, craftsmen and their pupils] (in German). p. 213. "NB this is not the 1805 version available from Google Books".

Anybody else? Otherwise it may be that this, like long s, has a code point for historians to use but is no longer seen in the wild? --𝕁𝕄𝔽 (talk) 10:02, 23 October 2023 (UTC)[reply]