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LiskeardRich
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« Reply #16 on: May 04, 2011, 14:18:13 » |
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the way i was taught at school was BODMAS as rule of operations B rackets O  cant remember but possibly pOwers D ivision M ultiplication A ddition S ubtraction so the 2+2x2 will be 6 the division question is 9 |
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All posts are my own personal believes, opinions and understandings!
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LiskeardRich
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« Reply #17 on: May 04, 2011, 14:21:24 » |
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Interesting actually, the way you state it makes perfect sence for it to be 9 too. I had initially worked it out as 1.
6 / 2(3)
6/6 = 1
The thing with getting 9 is the fact that you get 9 if you ignore bidmas, i.e. divide, then brackets since: 6/2 x (1+2) => 3 x (1+2) => 3x3 = 9, and as you've broken the rules of bidmas it must be wrong (?)
if you ignore bodmas/bidmas
do the brackets, then mulitplication then division you get 1,
correctly you'd do 6/2 followed by the answer x3
incorrectly you could do 2(3) =6 then 6/6 to get 1.
You can't achieve the answer of 1 by fouling the rules as far as I can tell!
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All posts are my own personal believes, opinions and understandings!
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Phil
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« Reply #18 on: May 04, 2011, 15:00:24 » |
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I get "hotel", but then I tend to always think in words rather than numbers.
Assuming B to be the 2nd letter of the alphabet, then... wait for it...
A hotel equals twice a B&B
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paul7575
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« Reply #19 on: May 04, 2011, 15:01:39 » |
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The O in 'BODMAS' was reckoned by one of my teachers to stand for 'Of' as in 'power Of'. Another reckoned it stood for 'Order' meaning powers or roots etc. I guess teachers get it explained differently as well...  Always made me wonder if 'O' was used just to make the initials more easily pronounced though. I do think 'I for indicies' is a better version... Paul |
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Chris from Nailsea
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« Reply #20 on: May 04, 2011, 15:16:02 » |
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There's a good explanation of 'bodmas' on that website ...  |
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William Huskisson MP▸ was the first person to be killed by a train while crossing the tracks, in 1830. Many more have died in the same way since then. Don't take a chance: stop, look, listen.
"Level crossings are safe, unless they are used in an unsafe manner." Discuss.
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JayMac
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« Reply #21 on: May 04, 2011, 15:36:43 » |
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'BODMAS' Is that not Bodmin Parkway to Manors (Tyne and Wear)?  |
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"Build a man a fire and he'll be warm for the rest of the day. Set a man on fire and he'll be warm for the rest of his life."
- Sir Terry Pratchett.
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Mookiemoo
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« Reply #22 on: May 04, 2011, 15:53:55 » |
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If you write it as
a + aa then its obvious which comes first
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Ditched former sig - now I need to think of something amusing - brain hurts -I'll steal from the master himself - Einstein:
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
"Gravitation is not responsible for people falling in love"
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eightf48544
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« Reply #23 on: May 05, 2011, 07:55:41 » |
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I am sure I was was taught.
BOMDAS
Brackets, Ofs, multiplication, division, addition, subtraction.
With multiplication before division.
So my answer to the second one is 1 Brackets (1+2)=3 Multiplication 2(3) = 6 Division 6/6 =1.
BODMAS gives Brackets (1+2) = 3 Division 6/2(3) = 3/3 Division 3/3 = 1
There is a whole branch of mathematics based on these rules.
Functions can be associative or cummulative (I've forgotten the exact rules) but it means something like that in certain functions the order of calculation does or doesn't matter.
I've probably got a whole OU course unit on this in the loft. M100.
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grahame
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« Reply #24 on: May 05, 2011, 08:47:06 » |
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I always thought that the "O" was for Order - i.e. "raise to the power of".
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Coffee Shop Admin, Acting Chair of Melksham Rail User Group, Option 24/7 Melksham Rep
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LiskeardRich
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« Reply #25 on: May 05, 2011, 11:51:11 » |
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I am sure I was was taught.
BOMDAS
Brackets, Ofs, multiplication, division, addition, subtraction.
With multiplication before division.
So my answer to the second one is 1 Brackets (1+2)=3 Multiplication 2(3) = 6 Division 6/6 =1.
BODMAS gives Brackets (1+2) = 3 Division 6/2(3) = 3/3 Division 3/3 = 1
There is a whole branch of mathematics based on these rules.
Functions can be associative or cummulative (I've forgotten the exact rules) but it means something like that in certain functions the order of calculation does or doesn't matter.
I've probably got a whole OU course unit on this in the loft. M100.
your division of 3/3 was actually multip0lication in the original question 3x3 =9 |
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All posts are my own personal believes, opinions and understandings!
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inspector_blakey
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« Reply #26 on: May 05, 2011, 20:06:55 » |
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I am sure I was was taught.
BOMDAS
Brackets, Ofs, multiplication, division, addition, subtraction.
With multiplication before division.
So my answer to the second one is 1 Brackets (1+2)=3 Multiplication 2(3) = 6 Division 6/6 =1.
BODMAS gives Brackets (1+2) = 3 Division 6/2(3) = 3/3 Division 3/3 = 1
There is a whole branch of mathematics based on these rules.
Functions can be associative or cummulative (I've forgotten the exact rules) but it means something like that in certain functions the order of calculation does or doesn't matter.
I've probably got a whole OU course unit on this in the loft. M100.
And there you have the problem with BODMAS - it implies that division takes precedence over multiplication, with addition taking precedence over subtraction. In fact there is no such rule, with division/multiplication and addition/subtraction treated equally. |
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TerminalJunkie
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« Reply #27 on: May 05, 2011, 23:16:51 » |
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A little experiment for MS Windows users: launch Calculator, and enter 1 + 2 * 3 =.
Make a mental note of the answer, then set it to 'Scientific View' and do the same calculation...
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Daily Mail and Daily Express readers please click here. |
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Chris from Nailsea
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« Reply #28 on: May 06, 2011, 11:05:02 » |
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William Huskisson MP▸ was the first person to be killed by a train while crossing the tracks, in 1830. Many more have died in the same way since then. Don't take a chance: stop, look, listen.
"Level crossings are safe, unless they are used in an unsafe manner." Discuss.
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