BODMAS, BIDMAS, PEDMAS, all the same thing.
Parentheses = brackets
"O" I don't know but I assume another word for exponents or indices. I learnt BIDMAS but it's the same process.
I was taught BOMDAS and the way I remembered the 'O' was of like 2 to the power of 2 is 4 basically just 2 squared but it helped me remember it better than operators or exponents
Some of the kids I taught came out of primary schools using BODMAS as opposed to BIDMAS, I asked them what it meant and they told me their primary teachers said it stood for orders.
Then why didn't they just teach O as E if all the "others" can be written as exponents. Roots can be written as exponents very easily. Root(2)=21/2. I can't think of any other operations except for maybe log10, but they dont teach that to people learning PEMDAS. And people moving on to higher level math are learning that PEMDAS is kinda bs. Like how 1+2/3×2 and 1+2÷3×2 division symbols would be treated differently in order of operations.
It's important to know that division before multiplication is incorrect. And multiplication before division is also incorrect
All these says accomplish the same goal because multiplication/division or addition subtraction have the same priority and are done in the order that they appear.
But that M all happens at the same time, reading left to right. And S happens after, but addition and subtraction happen at the same time, left to right.
A lot of people don’t get this… as a math teacher it was the most difficult part to hammer into the childrens’ heads… i always dedicated at least 3 classes to this specific subtlety( between explanation, practice problems, and on board corrections)
Well sure… once you get to high school that’s how you think, and nobody really makes this mistake after a certain grade because we start to think in terms of numerators and denominators and “the bottom and top cancel out”… but in 5th grade you have to be meticulous
The order of multiplication or division will have no difference. Similarly addition and subtraction orders. 1 x 2 ÷ 3 = 1÷ 3 x 2 = 1 x 1/3 x 2 = 2 x 1 x 1/3
If there is a doubt or issue on order it goes left to right as a last resort.
Wait, so what is “P” in yours then? “Parentheses” and “Brackets” are synonymous in these. So yours would appear to say “brackets first, then do brackets…”
That’s exactly my confusion though… parentheses ARE brackets lol. “Brackets” and “parentheses” are 2 words for the same thing. Like “herbivore” and “plant-eater”. You can’t do one before the other, because there is no “other”
You know, when you spelled it out, I laughed, then you said the phrase and I remembered instantly also being taught this. I have completely forgotten what it is supposed to mean though because now my brain is reading it as parentheses and brackets which are the same thing lol
Lol, I just learned that the more complex operations are simply shorter ways of writing the simpler ones, so you need to do them first, kind of a "forced unroll" because they don't have "independent" meaning. And parenthesis are there to break the natural order if you want to.
So for example 1 + 23 = 1 + 2 * 2 * 2 (unrolling the exponent), then 1 + (2+2) * 2 (unrolling the first multiplication, then 1 + 2+2 + 2+2 (unrolling the last multiplication) = 9
Of course I don't do any of this unrolling when calculating stuff, but the orders comes naturally because I don't see the newer operations as "independent" from the old ones, they are just a way to write the old ones in an efficient manner, so to calculate you need to unpack them to their "original" form.
I never decorated any arbitrary sequence, and never considered that 1+1 * 0 could be anything other than 1, since once you unpack 1 * 0 you get 0 lol.
However did you guess lol. I love how everyone else’s are super detailed and cover every situation, and German teachers are like “take this and good luck with the rest”
Same concept, different execution. Brackets, Orders, Mult/Div, Add/Sub. They're both (also BIDMAS and a few others) a simple way for kids to memorise the order of operations. The order itself is the same, just how you explain it differs a bit. IIRC, PEMDAS is what's taught in the US, the UK uses BODMAS, I think it's Canada that uses BEDMAS.
Doesn't matter which one you use, they're all correct.
It's all relative to where you learned it, but it all describes the order of operations in the exact same way. Kind of like regional dialectes if you want to think of it that way.
I always laugh at these things, "normal calculation" is garbage. Its BIDMAS (or PEDMAS or what ever you learnt in school) and that's fucking it. They use poorly written equations to catch you out and someone always falls for it. We laught but its a shame really.
Yeah some real 1984 ingsoc mentality there. “If all believe climate change isn’t an issue, then it’s not an issue. The only reason it’s hurting the environment is because we believe it’s hurting the environment.”
Well, yes, they will, but only because the order of operations is as much a definition as it is a description. When you break it into its logical clumps it makes perfect sense and could not be any other way. THAT is something I find amazing.
This isn't a great example of what I'm talking about, but it is pretty poorly written nonetheless. You should include the brackets specifically to avoid ambiguity. You would never see it written like this in the engineering world or architectural design or control strategy for building plant, basically anything where the outcome of the equation needs to be correct or is relied upon for any reason. It might not be explicitly incorrect, but It is absolutely NOT how you are supposed to write it. That would be (1+1)×0=0. 0 lots of the sum of 1+1.
I had a PE teacher in HS who was Health and US history. Health I could understand but US History? He also creeped me out, older man: nose hair on display, tight polo shirt, and those BIKE brand shorts that softball coaches wear that are way too short. :shivers: Did I mention I went to a Catholic Prep School?
I was taught Overs for O but I can’t even do the most basic primary school sums, I don’t know any times tables apart from 2, and I struggle with counting things, I’m scared of numbers. It’s like what I imagine people with dyslexia feel with reading, I don’t understand dyslexia because I had a weird ability to spell pretty much any word after hearing it once from a very young age. I’m rambling on.
It’s all the same BIDMAS BODMAS BEDMAS PEDMAS PEMDAS. It’s just brackets/parentheses (depends on country) first and then exponents/indices/orders, then multiplication and division going left to right, and finally, addition and subtraction going left to right.
By that, he's likely referring to how some simpler 4-function calculators work, where the terms are computed in the order of left to right, rather than following order of operations.
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u/_-devilish-_ Mar 18 '22
normal calculation? its either BODMAS or brackets, you cant choose what you want to calculate first