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 Post subject: 'Halfway' Q
PostPosted: Mon Sep 08, 2008 12:21 pm 
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Joined: Thu Jul 17, 2008 11:09 am
Posts: 10
Location: lewisham
Can someone, please, clarify.

Does HALFWAY mean exactly that - half? My D put in the last column difference between the product and the sum.

Q: Calculate the product and the sum of each pair of numbers in the table and then calculate the number which is HALFWAY between each sum and product.


12 and 3 - product (36); sum (15); halfway (10.5 ???)
17 and 5 - product (85); sum (22); halfway (31.5 ???)


Thanks


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PostPosted: Mon Sep 08, 2008 12:29 pm 
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Joined: Wed Jan 02, 2008 12:18 pm
Posts: 490
Location: kent
I would have thought it meant what it says - the number that is halfway in between the two numbers you have found. Try the following method:- imagine they are houses along a road - find the number of the house that is halfway in between house number 15 and house number 36.

Hope this is right.

Good luck.


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 Post subject:
PostPosted: Mon Sep 08, 2008 12:56 pm 
Perplexed is correct.

36-15=21

21/2=10.5

15+10.5=25.5 which is halfway


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 Post subject: Halfway Q
PostPosted: Mon Sep 08, 2008 1:11 pm 
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Joined: Thu Jul 17, 2008 11:09 am
Posts: 10
Location: lewisham
Thanks. I was not sure because the numbers in the answer were not whole.

Irene


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 Post subject:
PostPosted: Tue Sep 09, 2008 7:38 am 
It is much easier to find halfway between 2 numbers by adding them, then taking their average.

i.e.
36+15=51
51/2 = 25.5

It saves on one operation.

Hope this helps.


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