Maths Question and speed

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devg
Posts: 17
Joined: Sun May 11, 2008 9:55 pm

Maths Question and speed

Post by devg »

I was looking at one of the Maths questions with my daughter. The question is

Gretchen pays $29.99 for a DVD on her holiday. The exchange rate is £1=$1.90. How much was DVD in pounds?

What is the best way to do this question in shortest possible time?

Thanks for the help !!
SunlampVexesEel
Posts: 1245
Joined: Fri Jul 06, 2007 9:31 pm

Re: Maths Question and speed

Post by SunlampVexesEel »

devg wrote:I was looking at one of the Maths questions with my daughter. The question is

Gretchen pays $29.99 for a DVD on her holiday. The exchange rate is £1=$1.90. How much was DVD in pounds?

What is the best way to do this question in shortest possible time?

Thanks for the help !!
Well for a starters the exchange rate is not realistic anymore :(
and I though DVDs were cheaper in the US anyway... unless it is maybe a box set?

Personally I would just go for long division... divide 299.9 by 19

but you could be at it for a while... it's not exact... does it say how close you need to get... number of DP?

£15.78...

Regards
SVE
Animis opibusque parati
devg
Posts: 17
Joined: Sun May 11, 2008 9:55 pm

Post by devg »

Hi SVE,

Thanks for the response. I agree that it is better to do it this way and not try dividing 2999 by 190. For CSSE Maths, I think it is apprxmt. 1 minute a question. Hence wanted to know, if there were faster ways of doing this. The question paper which we were looking at wanted the answer in 2 decimals.
SunlampVexesEel
Posts: 1245
Joined: Fri Jul 06, 2007 9:31 pm

Post by SunlampVexesEel »

devg wrote:Hi SVE,

Thanks for the response. I agree that it is better to do it this way and not try dividing 2999 by 190. For CSSE Maths, I think it is apprxmt. 1 minute a question. Hence wanted to know, if there were faster ways of doing this. The question paper which we were looking at wanted the answer in 2 decimals.
maybe an estimate...

29.99 approx $30

1.9 approx 2 $/£

answer £15

But 2dp suggests it's got to be division...

Regards
SVE
Animis opibusque parati
moved
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Post by moved »

Which year is the question from?
devg
Posts: 17
Joined: Sun May 11, 2008 9:55 pm

Post by devg »

This was from one of the test papers which we downloaded from *** Advertising Censored *** Education web site
moved
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Joined: Fri Oct 12, 2007 1:42 pm
Location: Chelmsford and pleased

Post by moved »

I've never seen an Essex paper that requires long division.
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