Posts Tagged ‘decimals’
Using the same notation for different things, and then treating them as the same anyway
Posted by: Gary Ernest Davis on: August 16, 2011
On the last Twitter #mathchat there seemed to me to be a fair amount of confusion about what constitutes a fraction. Commonly, people were treating any expression of the form as a fraction, no matter what were . Confusion about fractions is something I’ve experienced in many places, in many contexts. The confusion seems to […]
Is rationalizing rational?
Posted by: Gary Ernest Davis on: May 3, 2011
Rationalize or get it wrong? Text books and test setters regularly mark students wrong if they give an answer of to a problem. A student is supposed to know, as part of mathematical convention, that should be rationalized to . This issue has been discussed before by @suburbanlion at SuburbanLion’s Blog and @jamestanton at Rationalising […]
