What is 1+2x3?

What is 1+2x3?

53 posts
20 July 2013
EdT
Photographer
EdT
mantisphoto
The use of brackets to clarify meaning is only necessary when the meaning is anything other than the standard one. Now, could somebody please find me the square root of  -36 ... this is where it gets fun!
If you know that a large part of the population knows nothing of BIDMAS is is quite likely to come up with the wrong answer, then the use of brackets to clarify meaning is a good idea whether or not the meaning is anything other than the standard one. What's the fun of 6i (or even -6i)?
Posted 30 July 2013
Edited by EdT 30 July 2013
pmeu
Photographer
pmeu
click_gotcha
 I have an O level in Maths.  I also have an O level in Arithmetic. 
So would you argue that arithmetic is not mathematics?
Posted 31 July 2013
stolenfaces
Photographer
stolenfaces
Describing this calculation as 'Mathmatics' is like calling making a piece of toast , cooking.
It may be technically correct but ridiculously grandoise.

Arithmetic describes the topic accurately, mathematics is broad enough to be inaccurate.


Posted 31 July 2013
pmeu
Photographer
pmeu
But stolenface ... you said its not mathematics and it is. I would probably describe it myself as simple arithmetic but I wouldn't go around saying it isn't mathematics, because that would just be incorrect. But it is nice to see that even when you are factually incorrect you'll still argue.

Posted 31 July 2013
cziiki
Photographer
cziiki
stolenfaces
Describing this calculation as 'Mathmatics' is like calling making a piece of toast , cooking. It may be technically correct but ridiculously grandoise. Arithmetic describes the topic accurately, mathematics is broad enough to be inaccurate.
You're wrong Niel, tragically, terribly, terribly wrong. From Wolfram Alpha: "Arithmetic is the branch of mathematics dealing with integers or, more generally, numerical computation". Calculators will internally change an arithmetic expression to rpn before calculating the result anyway. Probably more pertinent to photographers is arithmetic of the form "how many models does it take to change a light bulb?"** Though if you have a pertinent model to hand you will want to take pictures of her pert person rather than ask her to change a light bulb, or define branches of mathematics. **The answer depends on the light bulb, also if you mean a half naked girl or an economic or theoretical model. Does qcd apply to girlie pictures? Yes of course, if you are using LED lights
Posted 1 Aug 2013
pmeu
Photographer
pmeu
‘ Describing this calculation as 'Mathmatics' ….. may be technically correct but ridiculously grandoise.’ … ‘Arithmetic describes the topic accurately, mathematics is broad enough to be inaccurate.’

The original statement by hhoa which you decided to correct was

‘1 + 2 x 3 = 7 due to the order of operations in mathematics as i learnt at school.
1 + 2 x 3 should be the same as 1 + (2 x 3). Brackets should be unnecessary’

In what sense is that made unclear, ridiculously grandiose or otherwise too broad as to be inaccurate by the use of the word mathematics rather than arithmetic?


Posted 1 Aug 2013
stolenfaces
Photographer
stolenfaces
pmeu
‘ Describing this calculation as 'Mathmatics' ….. may be technically correct but ridiculously grandoise.’ … ‘Arithmetic describes the topic accurately, mathematics is broad enough to be inaccurate.’ The original statement by hhoa which you decided to correct was ‘1 + 2 x 3 = 7 due to the order of operations in mathematics as i learnt at school. 1 + 2 x 3 should be the same as 1 + (2 x 3). Brackets should be unnecessary’ In what sense is that made unclear, ridiculously grandiose or otherwise too broad as to be inaccurate by the use of the word mathematics rather than arithmetic?
It's a simple calculation, rather meaningless to 99% of people without any context. Context makes the answer obvious. If you are in the one percent who think it is interesting in and of itself then by all means describe it as mathematics and rest assured that your refusal to use brackets is principled and worthwhile. If you were a real mathemation you would be more interested in why some people would get the answer 9 when using a calculator. Obviously the calculator is actually resolving the expression each time you hit an operator, thus the effect is to resolve the expression from left to right.
Posted 1 Aug 2013
pmeu
Photographer
pmeu
You are all over the place stolenfaces.

As it happens, I am actually a real mathematician/economist at a real proper top university.

I haven't ever said I wouldn't use the brackets. Where do I ever say or even hint that I wouldn't use brackets? I would argue that you really shouldn't have to use the brackets, but if it meant that somebody else trying to do the correct calculation was less likely to get it wrong then I would probably use the brackets. Just in fact as I sometimes use brackets to group conceptual components of a long equation when brackets aren't always needed. So I'm pragmatic about that. So there you go, that's my opinion on the matter ... clearly not the same as mantisphoto and much more in line with yours, but I hope I've conveyed that without having to resort to insults.

And I know exactly why the calculator gives the answer 9.

All that happened was you made an unnecessary and factually incorrect comment on a perfectly reasonable and correct post ... I just thought you'd be happy with the correction.

Posted 1 Aug 2013
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