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PostPosted: Fri Aug 09, 2013 12:26 pm 
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Joined: Tue Sep 07, 2010 8:23 pm
Posts: 27
Hi
Pl HELP
stuck with this question

Library A has 67 books more than Library B, This morning Librarian moved 11 books from Library A to Library B
How many fewer books now in Library B as compared to Library A

answer is 45
Dont know how
Could you guide us about how to improve worded questions in Maths?
Thanks
Deepa


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 Post subject: Re: maths
PostPosted: Fri Aug 09, 2013 12:35 pm 
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Joined: Mon Aug 22, 2011 8:20 pm
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Location: Warwickshire
Have a look at this thread: viewtopic.php?t=21610
and then see if you can work it out.


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 Post subject: Re: maths
PostPosted: Fri Aug 09, 2013 12:38 pm 
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Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11956
Also think about library A having 67 books and Library B 0 books ...


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 Post subject: Re: maths
PostPosted: Fri Aug 09, 2013 4:00 pm 
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Joined: Tue Sep 07, 2010 8:23 pm
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Thanks a lot
Any more suggestions to improve on these type of questions


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 Post subject: Re: maths
PostPosted: Fri Aug 09, 2013 5:50 pm 
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Joined: Mon Feb 12, 2007 1:21 pm
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practising them!

I find if pupils make up their own problems or re-word exisiting ones then they begin to see how problems work.


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 Post subject: Re: maths
PostPosted: Fri Aug 09, 2013 8:11 pm 
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Joined: Mon Jun 18, 2007 2:32 pm
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Location: East Kent
deepa wrote:
Thanks a lot
Any more suggestions to improve on these type of questions


diagrams, write it out, draw pictures, arrows

plus, practice, practice, and more practice


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 Post subject: Re: maths
PostPosted: Mon Aug 12, 2013 3:41 pm 
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Joined: Mon Aug 12, 2013 9:13 am
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I am not impressed by this question as it assumes Library B has 0 books. The answer will be different depending on the number of books Library B has. Just wondering which book is it from?

Word problems can be mastered by practising over and over for variety of types. See Bond Assessment Book 1 & Book 2 for 11-12, 12-13 etc.


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 Post subject: Re: maths
PostPosted: Sun Sep 01, 2013 9:28 pm 
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Joined: Wed Jan 18, 2012 11:41 am
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Location: Essex
parent2013 wrote:
I am not impressed by this question as it assumes Library B has 0 books. The answer will be different depending on the number of books Library B has. Just wondering which book is it from?

Word problems can be mastered by practising over and over for variety of types. See Bond Assessment Book 1 & Book 2 for 11-12, 12-13 etc.


I may be having a bad evening maths-wise, but whatever numbers of books for Library A and Library B I start with I still end up with a difference of 45 books once the 11 have been moved, as in the answer...

_________________
Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read.Groucho Marx


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 Post subject: Re: maths
PostPosted: Sun Sep 01, 2013 9:33 pm 
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Joined: Tue Jul 21, 2009 9:56 pm
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Yes. The number each library has to start with does not matter so long as the library with more books has 67 or greater. 67 - 22 equals 45.

When you move one item from one pile to another you change the difference between the two piles by 2.


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 Post subject: Re: maths
PostPosted: Mon Sep 02, 2013 6:43 am 
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This is just a twist on the fairly standard "if there are x pupils in the school, and y more boys than girls, how many boys are there".


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