It is currently Thu Dec 08, 2016 6:03 am

 All times are UTC

 Page 1 of 2 [ 16 posts ] Go to page 1, 2  Next
 Print view Previous topic | Next topic
Author Message
 Post subject: Help needed with NFER 11C 47 & 11B 45Posted: Fri Aug 21, 2009 12:21 am

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
What is is quickest method to work out:

Q47 A map of Scotland is drawn to scale of 1:325,000.
how many CM on the map would show 65KM?

Q45 A map of Holland is drawn to a scale of 1:400,000.
What real distance is represented bt 1CM on the map?

Top

 Post subject: Re: Help needed with NFER 11C 47 & 11B 45Posted: Fri Aug 21, 2009 2:31 am

Joined: Fri Jul 24, 2009 1:10 pm
Posts: 32
scooby1 wrote:
What is is quickest method to work out:

Q47 A map of Scotland is drawn to scale of 1:325,000.
how many CM on the map would show 65KM?

Q45 A map of Holland is drawn to a scale of 1:400,000.
What real distance is represented bt 1CM on the map?

Q47

1:325,000 means 1 cm shows 325,000 cm,
converted to metres 1 cm shows 3250 metres
converted to km 1 cm shows 3.25 km

so to show 65 km
65/3.25 which gives 20 cm

Q45

using the same logic of converting to metres and then km
1cm represents 4km

That is how I would explain the problem to my children - I'm not sure they are quite up to this at the moment though.

Top

 Post subject: Posted: Fri Aug 21, 2009 8:27 am

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
we looked at a map book
(which conveniently had 1cm=25k 1:25000 scale ) on the front.

also those kitchen/bathroom planner grids you can get in B&Q with baths and units to scale. Once he had seen how it worked the calculations were easier.

Top

 Post subject: Posted: Fri Aug 21, 2009 8:30 am

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
Thanks beebee, I understand them now.

Top

 Post subject: Posted: Fri Aug 21, 2009 8:54 am

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
A great idea YOYO123 will pop into my local B&Q today.

Top

 Post subject: Posted: Fri Aug 21, 2009 12:07 pm

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
I thought I understood! However, I do not understand why you divide 65 by 3.25. Please explain. Thank you.

Top

 Post subject: Posted: Fri Aug 21, 2009 12:30 pm

Joined: Mon Aug 13, 2007 10:47 am
Posts: 3310
Location: Warwickshire.
Because every 1cm is 3.25km.

But you need to find out how many cms represent 65km (because that is the question)

Therefore you have to divide 65 by 3.25 to find out how many 3.25s go into 65km in order to find out the answer.

I hope that helps...

Top

 Post subject: Posted: Fri Aug 21, 2009 2:44 pm

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
IF 1 CM represents 3.25km

then 10cm represents 32.5km

32.5km is half of 65km

therefore 20 cm represent 65km

Top

 Post subject: Posted: Fri Aug 21, 2009 2:54 pm

Joined: Wed Aug 12, 2009 11:49 pm
Posts: 32
I feel so silly now!

Top

 Post subject: Posted: Sat Aug 22, 2009 12:46 pm

Joined: Tue May 05, 2009 9:26 pm
Posts: 444
My DS finds this type of questions very difficult. Can anyone point me to any sample questions /exercises on the internet? I have looked at Guest 55's useful maths websites and I have also googled but to no avail. Maybe I'm inserting the wrong terms in google /the websites????I have put in " maths scales" in. Anybody got any better ideas for a search term?

Thanks

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 2 [ 16 posts ] Go to page 1, 2  Next

 All times are UTC

#### Who is online

Users browsing this forum: No registered users and 2 guests

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ FORUM RULES    Forum Rules and FAQs 11 PLUS SUBJECTS    VERBAL REASONING    MATHS    ENGLISH    NON-VERBAL REASONING    CEM 11 Plus GENERAL    GENERAL 11 PLUS TOPICS    11 PLUS APPEALS    11 PLUS TUTORS    INDEPENDENT SCHOOLS    11 PLUS CDs/SOFTWARE    11 PLUS TIPS    PRIMARY    SEN and the 11 PLUS    EVERYTHING ELSE .... 11 PLUS REGIONS    Berkshire    Bexley and Bromley    Birmingham, Walsall, Wolverhampton and Wrekin    Buckinghamshire    Devon    Dorset    Essex    Essex - Redbridge    Gloucestershire    Hertfordshire (South West)    Hertfordshire (Other and North London)    Kent    Lancashire & Cumbria    Lincolnshire    Medway    Northern Ireland    Surrey (Sutton, Kingston and Wandsworth)    Trafford    Warwickshire    Wiltshire    Wirral    Yorkshire BEYOND 11 PLUS    Beyond 11 Plus - General    GCSEs    6th Form    University