Subject: Division sign
A fellow teacher recently asked if I remembered the exact word for a division bracket (not the symbol with dots, the horizontal line in a fraction, or a solidus). I couldn't. Can you help?
By the way, I was directed to this site by Laura at "Ask Dr. Math." I'm delighted to find it and will pass it on to my fellow middle school teachers.
We received a similar question some time ago which is maybe why Laura directed you here. That question was Could you tell me the name for the bar in a division problem?
A good reference for this type of question is the Earliest Uses of Various Mathematical Symbols which is a resource put together by Jeff Miller partly from the replies sent to a question he asked the math-history-list at the Math Forum.
In Jeff's resource list is the following entry:
DIVISION SYMBOL - CLOSE PARENTHESIS AND VINCULUM was first used by Michael Stifel in 1544 in Arithmetica integra.
Vinculum is a line or brace drawn over a quantity consisting of several members or terms, in order to connect them so "CLOSE PARENTHESIS AND VINCULUM" is
12 ______ ______ ) as in 5) 60
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