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#1 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 19:51:46
u try on ur calculator.. 30÷2(2+3)÷5 and also try 30÷2x(2+3)÷5
both give different answer.. it's not the calculator's error, it's just for most calculators, they'll add in an extra bracket for u which makes it 30÷[2(2+3)]÷5.
yeah this kinda question doesn't need any device to get the ans, we just want to cross check. 
#2 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 19:27:21
yay hehe thx a lot for supporting my answer!
#3 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 19:05:53
this is my explanation..
the problems we face are alw e.g. 30 - 2*(2+3) / 5, which naturally will be multiplying the 2 to () 1st.. but for this case, it is 30 / 2*(2+3) / 5 so the left to right rule must be followed.. the order of operations only apply to the numbers IN the bracket, not OUTSIDE it, so the 2 cannot be the priority..
as for the calculator, I think most calculators just auto add in brackets for u, so it becomes 30 / [2*(2+5)] / 5 which gives 0.6..
Microsoft excel gives ans 15 hehe
the debate can be never ending.. hehe
#4 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 18:59:28
lol.. 15 or 0.6?
#5 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 18:51:23
they know the BODMAS rule but they insist that the 2 is attached to the (), which gives them 0.6.. many calculators also show 0.6
#6 Re: Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 18:33:56
Hi thx for the reply!
hehe can u believe more than 13k ppl voted 0.6 but only 6k ppl voted for 15 on facebook?
#7 Help Me ! » easy question?? 30÷2(2+3)÷5 = ? » 2011-04-27 17:54:47
- candyxy
- Replies: 16
Dear all
Please help to solve this qn.. there has been a debate on this simple qn, but of course I already have the answer in mind which I am 99% confident. I just want to know whether my answer is 100% correct by hearing from the experts here.
30÷2(2+3)÷5 = ?
My answer is 15. What about yours?
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