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Анкета
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
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Тема: 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ? |
353 одговори
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Quote ( Sion Francis @ April 4th 2012,12:35:56 )
This debate makes me weep for humanity, it really does...and not for the reasons most people think.
There seems to be a general smugness surrounding those who think the answer must lie in BODMAS that they know the answer and that anyone who thinks differently is wrong. This is the bit that annoys me; the assumption that what you learnt in year 8 maths must always apply. That assumption is wrong.
Obviously, BODMAS gives 15, left to right gives 0. In the real world there are examples where both systems are used, and accordingly the full answer is that the question is ambiguous.
All there is to it.
You know what you're right, the answer is both 0 and 15 depending on how its worked out! I assumed it was 0 based on simple left to right Math not BODMAS as I should have looked at it, when I learnt Math I only used BODMAS in algebra and never applied it to simple arithmetic
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Quote ( Sion Francis @ April 4th 2012,12:52:02 )
As an example, read up on the programming language "Smalltalk" which uses a left to right order of operations.
Thanks :) i did have a look and:
Note that because the meaning of binary messages is not hardwired into Smalltalk-80 syntax, all of them are considered to have equal precedence and are evaluated simply from left to right. Because of this, the meaning of Smalltalk expressions using binary messages can be different from their "traditional" interpretation:
3 + 4 * 5
is evaluated as "(3 + 4) * 5", producing 35. To obtain the expected answer of 23, parentheses must be used to explicitly define the order of operations:
3 + (4 * 5)
Although, i get your point, is no difference from knowing how a non-scientific calculator works, meaning that human brain is needed to know what to do, as it says, if you wanna have the expected answer you need to put brackets, otherwise you may not get the output you may expect, cause that's the way the program works.
There must be set and not debatable rules, otherwise everything would be a mess :P
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Quote ( Franco Dei Cas @ April 4th 2012,13:06:52 )
There must be set and not debatable rules, otherwise everything would be a mess
The question was 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
There are no brackets in the question. Placing brackets into the question is making an assumption.
Rule 1: You cannot make assumptions in maths.
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Where did i say, we should put brackets in that Chris? :)
Oh i see, what i was saying is referring to the quote above, not the problem here :)
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Quote ( Franco Dei Cas @ April 4th 2012,13:06:52 )
There must be set and not debatable rules, otherwise everything would be a mess
The point is, there is not. If i am a programmer programming in smalltalk I need to know and understand that I am working with left to right order of precedence. It exists and it exists in the real world.
The whole question can be boiled down to whether you should assume the inclusion of the phrase "using BODMAS" in the question. Most people are taught assume it is included, but the best answer is "it's ambiguous, please clarify so that I can do the calculation you want".
Incidentally, assuming that a person capable of asking "5+5+5-5+fish+5-5*0 without parentheses has the understanding to want you to use bodmas is somewhat of a leap of faith, wouldn't you think!?
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Quote ( Franco Dei Cas @ April 4th 2012,13:15:12 )
Where did i say, we should put brackets in that Chris?
Here...
Quote ( Franco Dei Cas @ April 4th 2012,13:06:52 )
if you wanna have the expected answer you need to put brackets
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Thing is that as i agree, that left to right may be used in some programs, then is down to the user of such program to know that and then do accordingly
I see it as no difference from using a non scientific calculator, you must know what you are doing and to get the expected result, you must use standard rules
Still i haven't found a source saying that left to right is a rule found in any textbook of sort
Quote ( Chris Lee @ April 4th 2012,13:19:29 )
Quote ( Franco Dei Cas @ April 4th 2012,13:15:12 )
Where did i say, we should put brackets in that Chris?
Here...
Quote ( Franco Dei Cas @ April 4th 2012,13:06:52 )
if you wanna have the expected answer you need to put brackets Quote ( Franco Dei Cas @ April 4th 2012,13:15:12 )
Oh i see, what i was saying is referring to the quote above, not the problem here :)
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ale tempactwo kolejności zadać nie umieć zrobić:D
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Anything that's time's by 0 = 0 so the awnser is 0
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Quote ( Franco Dei Cas @ April 4th 2012,13:22:19 )
tros fo koobtxet yna ni dnuof elur a si thgir ot tfel taht gniyas ecruos a dnuof t'nevah i llitS
Don't understand? Try it from left to right then...
Quote ( Franco Dei Cas @ April 4th 2012,13:22:19 )
Still i haven't found a source saying that left to right is a rule found in any textbook of sort
Yeah, that works.
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Quote ( Sion Francis @ April 4th 2012,13:15:51 )
The whole question can be boiled down to whether you should assume the inclusion of the phrase "using BODMAS" in the question. Most people are taught assume it is included, but the best answer is "it's ambiguous, please clarify so that I can do the calculation you want".
Incidentally, assuming that a person capable of asking "5+5+5-5+fish+5-5*0 without parentheses has the understanding to want you to use bodmas is somewhat of a leap of faith, wouldn't you think!?
When there isn't any indication on what rule we should use, we could assume that it's the common rule that prevails...
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I answered 0 and claim to be decent at maths. Wow its been too long.
Silly me :)
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Quote ( Sion Francis @ April 4th 2012,13:15:51 )
Incidentally, assuming that a person capable of asking "5+5+5-5+fish+5-5*0 without parentheses has the understanding to want you to use bodmas is somewhat of a leap of faith, wouldn't you think!?
I think that is a majority rule. Working left to right would obviously be an exception to just simplify coding in rare cases. A very short leap of faith imo.
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Quote ( Joey Turner @ April 4th 2012,13:26:44 )
Anything that's time's by 0 = 0 so the awnser is 0
BODMAS/BIDMAS!!!!!!!
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the answer is 0 dumbasses
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Quote ( Daneks Britāls @ April 4th 2012,15:38:12 )
2+2:2=?
3
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Wow almost 40% are retards :O
Quote ( Dylan van den Berg @ April 4th 2012,15:33:25 )
the answer is 0 dumbasses
You're the dumbass :P
It would be 0 if it would look like that:
(5 + 5 + 5 - 5 + 5 + 5 - 5 + 5) x 0 = 0
But since there are no brackets only the last 5 gets multiplicated by 0 which is the first step and then only go from left to right.
5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 =
5 + 5 + 5 - 5 + 5 + 5 - 5 + 0 = 15
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Quote ( Dylan van den Berg @ April 4th 2012,15:33:25 )
the answer is 0 dumbasses
Have you ever went to any Math lessons ?
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Quote ( Kevin Parkinson @ April 4th 2012,08:15:35 )
Unlike the previous 2 or 288 thread, there is absolutely no ambiguity in this one so nothing to debate.
exactly, term separation, and that ends the discussion :)
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You should only work from left to right with equal stuff like multiplying and dividing, or plus and minus, not with multiply and plus...
BTW:
http://wiki.answers.com/Q/Is_Google_always_right
Answer: Always.
Fill in the question in Google and you will see answer :D
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Quote ( Wopke Hoekstra @ April 4th 2012,15:43:31 )
You should only work from left to right with equal stuff like multiplying and dividing, or plus and minus, not with multiply and plus...
Fill in the question in Google and you will see answer :D
Did you try yourself... and the answere is :
"Math Homework Answers Log InLogin Register
what is the answer to: 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 =
What is the answer to this and in what order do you perform operations?
Order of operation says ( exponents first then multiply/diide then add/subtract_ ) so first you do the multiplication 5x0=0
5+5+5-5+5+5-5+0
since now its all add/subtract the order doesnt matter according to order of operations you add/subtract from left to right
the answer is 15 "
What a surprise !!
that was fun but... end of the discussion
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I put it in every calculator I have (PC, phone, standart one), I asked every friend I know....The answer always is 0 (ZERO) ... So sorry :D
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Lol at the people who say, first do 5*0 xD.
Its obv 15 not even discussing needed -_-. Kinda sick that 38.5% (atm the ones who didnt pick 15) people fail at basic calculations. The true % will be a bit lower ofcourse because some people will have picked other answers for giggles! But still 30% whaaaaaaat!!!
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I wonder how Daneks have got so far (Elite) like that ? :o
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