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PostPosted: Sat Jul 30, 2011 5:15 pm 
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Joined: Fri Feb 20, 2009 2:05 pm
Posts: 103
Hi all
I have no clue how these problems are done with estimation - have always used the proportion technique - " this is to this so that is to how much " but looks like DD is expected to estimate - can someone make me understand please !

The question :

Given below is a table used for converting between grams and ounces :

24 gms = 0.85 ounces
40gms = 1.41ounces
5 gms = 0.18 ounces

Use the information in the table to convert 69 grams to ounces.

Ans : 2.44 ounces.

All help hugely appreciated !

Queenma


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PostPosted: Sat Jul 30, 2011 6:00 pm 
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Joined: Fri Oct 30, 2009 11:08 pm
Posts: 1226
Add them up.

24 + 40 + 5 = 69g

therefore 0.85 + 1.41 + 0.18 = 2.44oz


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PostPosted: Sat Jul 30, 2011 7:34 pm 
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Joined: Fri Feb 20, 2009 2:05 pm
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OMG ! Both me and my DD could not stop laughing at how silly we had been ! This is what happens when you miss simple things in the pursuit of complex / difficult solutions !

Thank you soooo much for your help !

Queenma


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PostPosted: Sun Jul 31, 2011 7:38 am 
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Joined: Fri Oct 30, 2009 11:08 pm
Posts: 1226
No problem. When doing this, you expect everything to be complicated so sometimes the simple way isn't as obvious as it should be. :)


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PostPosted: Sun Jul 31, 2011 8:35 am 
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Joined: Thu Jan 11, 2007 10:30 pm
Posts: 960
I've been tellingbds to remember that it has to be possible to do every question in about a minute- so if he thinks it needs complicated calculations, he's missing something. This has helped him a lot- there are always loads of questions thatnyou can answernjust by looking -if you look in the right way. That, of course, is the tricky bit!


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