How useful is mental math?

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InquilineKea
Posts: 301
Joined: Sun Mar 21, 2010 9:07 pm

How useful is mental math?

Postby InquilineKea » Sat Jun 18, 2011 2:11 pm

Since we're not allowed to use a calculator.

I know that you can answer that by going through a practice test, but I'm not going to open up any practice tests yet (while I'm still solidifying my fundamentals)

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HappyQuark
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Joined: Thu Apr 16, 2009 2:08 am

Re: How useful is mental math?

Postby HappyQuark » Sat Jun 18, 2011 4:51 pm

Very useful.

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InquilineKea
Posts: 301
Joined: Sun Mar 21, 2010 9:07 pm

Re: How useful is mental math?

Postby InquilineKea » Sat Jun 18, 2011 5:47 pm

Okay. So (for anyone who wishes to answer), what types of mental math do a significant fraction of GRE-takers miss out on - that could help them on the test?

Thanks!

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WhoaNonstop
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Joined: Mon Sep 21, 2009 1:31 am

Re: How useful is mental math?

Postby WhoaNonstop » Sat Jun 18, 2011 9:33 pm

InquilineKea wrote:Okay. So (for anyone who wishes to answer), what types of mental math do a significant fraction of GRE-takers miss out on - that could help them on the test?

Thanks!


Addition, Subtraction, Multiplication, Division

-Riley

gertrude616
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Joined: Mon Oct 24, 2011 9:55 am

Re: How useful is mental math?

Postby gertrude616 » Mon Oct 24, 2011 9:56 am

I think mental arithmetic may have some limited uses, e.g: card games and tricks, but in higher mathematics it helps in solving long involved computations. For example when dealing with astronomical quantities where approximations are useful the actual values wqill probably expressed as powers of ten, but the mental arithmetic will tell you if you're in the right ball park, versus by an exponential amount. ADS Press




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