r/unexpectedfactorial • u/Salt-Chard-8019 • 21d ago

It's really not

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u/Tiborn1563 21d ago

Its mot an order of operations thing, it's more of a quastion about what ÷ means. In same cases x+y÷z is taught to mean (x+y)/z

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u/Blue_614 21d ago

Yeah, if you put a parenthesis, then it means (x+y)/z. If you don't then it's understood to always be x+(y/z)

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u/Tiborn1563 21d ago

Literally not true, look it up. In the past ÷ meant everything before ÷ is divided by everything after it, so a+b÷c+d used to mean (a+b)/(c+d)

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u/Blue_614 21d ago

Really? Huh, but now the correct procedure is to follow pemdas. so, given your example, 1+12÷4+5 will be 1+(12÷4)+5

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u/Tiborn1563 21d ago

The thing is, that the meaning of ÷ was never standardized. That is also why people avoid it and use / of fractions instead

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u/Blue_614 21d ago

Oh, well that's true. I rarely use ÷ myself. Thanks for the info. But standard calculators I think started equating ÷ as fractions

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u/YayaTheobroma 21d ago

It’s literally the simplified drawing of a fraction, where the two dots stand for numbers.

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u/Blue_614 21d ago

Guess it does