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# Windows 7: 48÷2(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 28 posts The Republic of the Philippines 48÷2(9+3) = 288 48÷2(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... My System Specs
 15 May 2011 #122 GeneO Windows 10 Pro. EFI boot partition, full EFI boot 1,690 posts Quote: Originally Posted by Bill2 He he Micky, you went to school a loooong time ago. Ok, suppose we solve like this. 48÷2(9+3) = 48÷2(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: 48÷2(9+3) do the parens first 48÷2*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) My System Specs
 16 May 2011 #123 ausGeoff Windows 7 Professional x64 2 posts Melbourne Australia Google likes (48 ÷ 2) * (9 + 3) = 288 —That's good enough for me. My System Specs
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 16 May 2011 #124 clunkfish Windows 7 Enterprise x64 298 posts North Somerset, UK 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 My System Specs
 16 May 2011 #125 boogieboy Windows 7 Ultimate x64 SP1 | Windows 10 Pro 4,202 posts Lahore, Pakistan 288 ... final answer. My System Specs
 16 May 2011 #126 Everlong Windows 8.1 Pro x64 3,378 posts Morecambe, Lancashire, England Quote: Originally Posted by profdlp    Quote: Originally Posted by Everlong 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 My System Specs
 16 May 2011 #127 GeneO Windows 10 Pro. EFI boot partition, full EFI boot 1,690 posts Quote: Originally Posted by clunkfish 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. My System Specs
 16 May 2011 #128 arkhi Windows 2000 5.0 Build 2195 782 posts LOL. This problem reminds me of this: Let a=b a²=ab <-multiply both sides by a a²-b²=ab-b² <-subtract both sides with b² (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 My System Specs
 16 May 2011 #129 clunkfish Windows 7 Enterprise x64 298 posts North Somerset, UK Quote: Originally Posted by arkhi divide both sides with (a-b) But a=b, so a-b=0: and you can't divide by zero My System Specs
 16 May 2011 #130 The Howling Wolves Windows 7 Home Premium 64bit 9,642 posts California Quote: Originally Posted by clunkfish    Quote: Originally Posted by arkhi 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 My System Specs