>> (9.2+7.8+0+3.0+1.3+1.7) >in particular present any problem? There's no division. Each value >has an exact decimal representation. I'm prepared to assert that any >permutation of their sums also has an exact decimal representation. >Therefore they should have an exact binary representation, too.
Not true. They don't have an exact binary representation. If you check these numbers here.. http://www.h-schmidt.net/FloatConverter/IEEE754.html You'll find 9.2 -> 9.199999809265137 7.8 -> 7.800000190734863 and so on. So adding these numbers doesn't generate the same answer as doing it in base10 maths Andy Ling --------------------------------------------------------------------------------------- This email has been scanned for email related threats and delivered safely by Mimecast. For more information please visit http://www.mimecast.com ---------------------------------------------------------------------------------------
