YT2095 Posted May 20, 2005 Share Posted May 20, 2005 I`m sure all the maths guys know of this "rule" a simple question though, what does the `O` stand for in it? Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 It's BIDMAS and I stands for indicies.... I dunno where the BODMAS version came from, nor what O stands for, but I believe BIDMAS is the proper version! [edit]Or actually, thanks to http://www.acronymfinder.com/ Brackets Order Division Multiply Add Subtract But that doesn't take into account indices, maybe that's why an original BODMAS was changed to BIDMAS, I'm not sure, but I know they both exist for real. Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 nope I was taught BODMAS (I still have my notes!) we were told to ignore the `O` as we`de never really need it in our class (GCSE pt.1). secondly nested brackets with lower priority functions in them, in what order are they done? Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 thnx for the Edit, I knew I wasn`t Tripping! Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 Inside the brackets it always done first. I think when we were told about BxDMAS where x is undefined the other version came out at the same time, probably a student said something, I've always been aware of both anyway.. Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 does that work for nested brackets with low priority functions? ie: 2/(3x4+(2-1)) Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 Your both wrong its BIMDAS ~Scott Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 look, I dislike maths enough as it is, Don`t make things even worse for me Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 BIDMAS..... the B is first, the B stands for brackets, so brackets comes first.... besides, that's the function of brackets.... even BenSon agreed! Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 you missunderstand me somehow? I KNOW what BODMAS stands for (just wasn`t sure about the `O` bit). so I`ll ask again... HOW does it work with nested brackets where they contain lower priority functions? Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 Well, one of is missing something! Stuff inside the brackets it ALWAYS first. So with: 5 x (1 x (2 + 2)) You'd do the (1 x (2 + 2)) first because it's in brackets, but we've got another set of brackets, so we do that first. (2 + 2) = 4 then the 1 x 4 = 4 Then the 5 x 4 = 20 Brackets within brackets with lower priority..... whatever, stuff inside brackets is first, if there's brackets within the brackets they take priority within the outer brackets. Once you take a set of brackets with stuff inside you are taking a set part of an equation, or formulae, or expression, and then within that standard BIDMAS rules still apply, so brackets will always take priority, BIDMAS doesn't break down, even within a set of brackets. you bet I beat you BenSon Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 aight, here we go BIMDAS 2/(3x4+(2-1)) Brackets 2/(12+(1) 2/(13) Indicies none Multiplication none Division = .1538 ect done What the problem is? ~Scott Edit: Damn 5614(?) beat me to it Link to comment Share on other sites More sharing options...
matt grime Posted May 20, 2005 Share Posted May 20, 2005 The O in the BODMAS version stands for 'of' as in two thirds 'of' 4 Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 so it`s like Fractions then? Brackets Fractions then the rest? so 2 thirds OF 4 (a fraction) would be like 4/3= ans, then ans X 2. Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 I dont think so... 'two thirds of four' would be 2/3 * 4 BIMDAS Multiplication 8/3 Division =2.66666 ect ~Scott Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 I dont think so... 'two thirds of four' would be 2/3 * 4 BIMDAS Multiplication 8/3 Division =2.66666 ect ~Scott 2 thirds of 4 would be 4 split equaly into 3 parts, and then 2 of those 3 parts added together (or times by 2,same thing). surely? Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 2 thirds of 4 would be 4 split equaly into 3 parts, and then 2 of those 3 parts added together (or times by 2,same thing). surely? Well yeah, you get the same answer but isn't this about the order in which it is ment to be done. If you do it your way its like saying Brackets Division Multiplication Division Addition Subtraction Your way has dicision twice mine only once... ~Scott Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 NO!!!!!!!!!! my working out was for the `O` bit of BODMAS, if you like a Subsection of the whole, that`s just the way I work out fractions, that`s all as for the nested brackets I understand it now, I just wasn`t sure. it may be simple to all you math genius types, and mine may seem a stupid question, but we`re not ALL Born knowing it all! Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 NO!!!!!!!!!! my working out was for the `O` bit of BODMAS, if you like a Subsection of the whole, that`s just the way I work out fractions, that`s all as for the nested brackets I understand it now, I just wasn`t sure. it may be simple to all you math genius types, and mine may seem a stupid question, but we`re not ALL Born knowing it all! Yt needs the blue pills now I'm not saying your maths is wrong what i ment was the 'O' in BODMAS is superfluous, if the O mean of as in fractions then its no diferent to division. example, (2/3) two on three, fraction 2 (divided sign) 3 They mean the same thing so BODMAS is like Brackets, division, mutiplication, division, ect ~Scott Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 You agree that fractions are like division.... so one half is 1 divided by 2. So you cant have division in two places like you do in BODMAS, even if you do call it something.... just use BIDMAS And don't worry about not knowing maths! I understand little of the mathematical side of physics, but there's time to learn (no matter what age you are), but only if you want to, which you seemingly do, hence you asked the question here, don't be embarassed (or whatever) when you are learning, everyone has to do it at some point, or, well, they could just remain without the knowledge, but we're (SFN people) not normally like that! Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 so the 1`st Division is the same as the `OF` part then? Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 You agree that fractions are like division.... so one half is 1 divided by 2. So you cant have division in two places like you do in BODMAS, even if you do call it something.... just use BIDMAS Your almost right ITS BIMDAS !!! ....Ok maybe i need the blue pills .... ~Scott Link to comment Share on other sites More sharing options...
5614 Posted May 20, 2005 Share Posted May 20, 2005 Seemingly from matt grime's explanation 'of' is the same as division. But then division would come twice, BODMAS, and that doesn't include indicies anyway, so BIDMAS not only includes indicies, which makes it 'better' than BODMAS, it also cancels out the fact that the O and the D in BODMAS seem to mean the same thing. Link to comment Share on other sites More sharing options...
BenSon Posted May 20, 2005 Share Posted May 20, 2005 so the 1`st Division is the same as the `OF` part then? Sorry YT what do you mean by first division? Link to comment Share on other sites More sharing options...
YT2095 Posted May 20, 2005 Author Share Posted May 20, 2005 I mean using BODMAS as I was taught in class, the `O` part is OF. so it`s LIKE Division but specificly for Fractions, that covers the BO part. then next we encounter normal division (the D part) and the rest is easy. btw, I`m seconds away from regreting that I asked about it Link to comment Share on other sites More sharing options...
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