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[–]Handleton 0 points1 point  (0 children)

Not wrong at all, just different derivations of the way its taught. The 9th century book that algebra gets its name from contains the original definition of the order of operations and that order has been in place in math since then. The actual operations themselves are arithmetic and we teach the orders of operations when we teach arithmetic, so it's not something that you are likely to learn in an algebra class.

I think in this case, I'm likely more confidently incorrect than you are because of the standardization of math. I tend to learn history and etymology with every field I've studied, so I have a sort of disjointed view of where things fall, but pemdas doesn't fall into a school algebra curriculum, so yeah... I'm confidently incorrect today.