Conversation
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@clacke Oh, yeah. We use it in the lower grades. And it is only later that they inform you why it looks that way, right around the time we switch to the front-slash.
Also, I remember one instructor using the back-slash for truncated division (integer portion).
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@clacke I had a college instructor who said if there's any chance of misinterpretation you should be as clear and specific as possible. So write "x/(yz)" or "(x/y)z" as appropriate, even though "/" already has implied grouping.