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this is a little tricker than I'm used to for a skill testing question. Please help.

25+80-5/2*4

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closed as too localized by Asaf Karagila, t.b., J. M., Akhil Mathew Apr 12 '11 at 12:36

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In addition of being way too localized it is also not well defined. $(5/2)\times 4$ or $5\times (2/4)$? –  Asaf Karagila Apr 12 '11 at 8:37
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I don't understand. In your profile you claim to be a "programmer", but then why would you be asking this? –  Adrián Barquero Apr 12 '11 at 8:39
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See also Jonas Meyer's answer here –  t.b. Apr 12 '11 at 8:43
    
@Adrián he claims to be a newbie programmer, so it's understandable. –  Danny King Apr 12 '11 at 8:44
    
You're kidding, right? You can type this to Google or even the simplest pocket calculator and it would give you an answer in no-time. Or are you testing the system? –  JMCF125 Jun 13 '13 at 14:59

2 Answers 2

up vote 1 down vote accepted

The order in which you do the calculations can be remembered using "BODMAS"

Always do arithmetic in the following order:

  • Evaluate any brakets
  • Do indicies (powers)
  • Do division and multiplication
  • Do addition and subtraction

It's explained well here:

http://www.mathsisfun.com/operation-order-bodmas.html

So for your example: 25+80-5/2*4

First divide 5 by 2, then multiply that by 4. Add 25 to 80 then take the result of the previous multiplication from this addition.

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Somehow I am accustomed to excusing my dear aunt, Sadie. –  J. M. Apr 12 '11 at 11:13

$25+80-5/2*4=25 + 80 - ((5 / 2) * 4) = 95$

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