If you look at the arguments on math forums, you’ll see that there isn’t just one rule.
It is a convention, and different places teach different conventions.
Namely, some places say that PEDMAS is a very strict order. Other places say that it is PED|MA|S, where D and M are the same level and order is left-to-right, and same with addition vs subtraction.
And others, even in this post, say it’s PEDMAS, which I have heard before.
“Correct” and “incorrect” don’t apply to conventions, it’s simply a matter of if the people talking agree on the convention to use. And there are clearly at least three that highly educated people use and can’t agree on.
If you look at the arguments on math forums, you’ll see that there isn’t just one rule.
It is a convention, and different places teach different conventions.
Namely, some places say that
PEDMASis a very strict order. Other places say that it isPE D|M A|S, where D and M are the same level and order is left-to-right, and same with addition vs subtraction.And others, even in this post, say it’s
PEDMAS, which I have heard before.“Correct” and “incorrect” don’t apply to conventions, it’s simply a matter of if the people talking agree on the convention to use. And there are clearly at least three that highly educated people use and can’t agree on.