this post was submitted on 27 Nov 2025
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Was anyone else ever taught it as BOMDAS as opposed to BODMAS?
I don't think so, and I've seen Maths textbooks from all over the world. Only the U.S. wants to reverse the order of DM from everyone else's acronym. π
It was BEDMAS for us, where the E was exponents or something.
Found the Canadian
Nope, it's the same in Australia and the U.K.
Sorry, found the Commonwealther
Or more precisely, the non-USer π
Okay, sorry, found the person from a sane country π
PEMDAS, is that the same as BOMDAS?
They're all just different mnemonics for the same rules.
I think so. Amazing how many different ways there are to say it
So instead of Parentheses, Exponents is it Box and O that digit in the sky?
Brackets and Orders, not that anybody calls "(" a bracket or "^" an "order".
It's "to the order of" actually. 2Β² is 2 to the order of 2
Yes we do. They're ALL Brackets - square, round, squiggly...
Why do people put bot pairs of multiplication and division, and addition and subtraction on the acronym?
Do you really follow that order with the associative operations?
Because it's intended to be used as a checklist
Yep
There's no difference.
Addition and subtraction are the same operation, multiplication and division are the same operation.
So:
BO(MD)(AS) == BO(DM)(AS)
EDIT: in order to stop confusing people, it should just be: BOMA.
No they're not, but they are both binary operators.
Leaving out D and S confuses people about where to do them in the order. It's intended to be used as a checklist
You already said that to me. I replied here.
And you're still ignoring it
What do you mean? I replied to it...
Where you, yet again, ignored that I told you what you said is wrong, as per Maths textbooks
Yeah, I was taught BOMDAS here in Australia.
BODMAS (or BEDMAS), not BOMDAS. (unless they did that in some random state). I'm an Australian Maths teacher
Or it was some random teacher. Or it was more than fifteen years ago. I dunno, it was just what I was taught.
Yeah, maybe. My Year 7 students, who have come fresh to me from Year 6, use BEDMAS, and I teach BEDMAS for consistency (I also think it's a better acronym anyway - think of a massive 4-poster bed to ingrain the idea of BED-MAS)...
I was taught BODMAS in Australia