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Windows 7: 482(9+3) = ?

View Poll Results: Which answer do you prefer?
2 35 58.33%
288 25 41.67%
Voters: 60. You may not vote on this poll

15 May 2011   #121
kenmdotexe

Win7 Ultimate SP1 6.1.7601 x86
 
 

482(9+3) = 288
482(12) = 288
24x12 = 288

Division is to be done first before proceeding to multiplication since division is basically at the right. Multipication and division are equal in status in Pemdas, and Division is to be done first in the Standard Order of Operations( SOOO ). What you do is simply start from the left and go to the right. Thus both rule simplify both to 288!

Is that right folks? i'm still a kid...
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15 May 2011   #122
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

Quote   Quote: Originally Posted by Bill2 View Post
He he Micky, you went to school a loooong time ago.

Ok, suppose we solve like this.

482(9+3)
= 482(12)

Now, as per BODMAS, the division operator takes precedence over the (implied) multiplication operator so:

=24(12)
=288.

Can I vote again?
It is not that division takes precedence, but when there is ambiguity (with operators of equal precedence) then the calculation is performed left to right:

482(9+3) do the parens first
482*12 equal precedence operators, go from left to right
24*12 =
288

Division has the same precedence as multiplication since, after all, A/B*C = A*(1/B)*C

The best way to write that expression so it is not misunderstood, is (48/2)*(9+3)
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16 May 2011   #123
ausGeoff

Windows 7 Professional x64
 
 

Google likes (48 2) * (9 + 3) = 288

—That's good enough for me.
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.

16 May 2011   #124
clunkfish

Windows 7 Enterprise x64
 
 

It's kind of a pointless argument because the syntax is incorrect. You cannot imply multiplication of numbers by writing them next to each other - otherwise 23 could equal 6. This is true even when one of the numbers is an exclusively numerical expression in parentheses, so you cannot write 2(9+3). You could write 2(9a+3), but not 2(9+3). You'd have to write 2*(9+3). So neither 2 nor 288 is correct because the question is not valid.

Despite all that, I voted for 2
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16 May 2011   #125
boogieboy

Windows 7 Ultimate x64 SP1 | Windows 10 Pro
 
 

288 ...

final answer.
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16 May 2011   #126
Everlong

 

Quote   Quote: Originally Posted by profdlp View Post
Quote   Quote: Originally Posted by Everlong View Post
Multiplication doesn't have precedence over division though and vice versa. If they're the only two operands left in the sum, then you simply just work left to right and in this case it would be divide then multiply, hence you get 288.
You get the A+.
Thanks, prof
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16 May 2011   #127
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

Quote   Quote: Originally Posted by clunkfish View Post
It's kind of a pointless argument because the syntax is incorrect. You cannot imply multiplication of numbers by writing them next to each other - otherwise 23 could equal 6. This is true even when one of the numbers is an exclusively numerical expression in parentheses, so you cannot write 2(9+3). You could write 2(9a+3), but not 2(9+3). You'd have to write 2*(9+3). So neither 2 nor 288 is correct because the question is not valid.

Despite all that, I voted for 2
The syntax is fine. That is how it is done in mathematics all the time - omission of a multiplication sign when the number is multiplying a quantity in parentheses. In fact, usually when there is no ambiguity, like 2x=y, the multiplication operator is omitted.
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16 May 2011   #128
arkhi

Windows 2000 5.0 Build 2195
 
 

LOL. This problem reminds me of this:

Let a=b

a=ab <-multiply both sides by a
a-b=ab-b <-subtract both sides with b
(a+b)(a-b)=b(a-b) <-factor out
(a+b)=b <-divide both sides with (a-b)
a+a=a <-since a=b...
2a=a <-simplify and divide both sides with a
2=1

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16 May 2011   #129
clunkfish

Windows 7 Enterprise x64
 
 

Quote   Quote: Originally Posted by arkhi View Post
divide both sides with (a-b)
But a=b, so a-b=0: and you can't divide by zero
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16 May 2011   #130
The Howling Wolves

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by clunkfish View Post
Quote   Quote: Originally Posted by arkhi View Post
divide both sides with (a-b)
But a=b, so a-b=0: and you can't divide by zero
You can divide and multiply by zero...........but your answer will be zer0
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