Computer arithmetic is not the same as grade-school
arithmetic; "[Fixed-point arithmetic]", for example,
mentions that, in the former, 0.1 + 0.1 is unlikely
to be 0.2.

"[http://docs.sun.com/source/806-3568/ncg_goldberg.html%|%What Every Computer Scientist Should Know About
Floating-Point Arithmetic%|%]"
explores this in detail.



[[Explain [expr]'s history.]]

See also [Decimal arithmetic],
[[(back?)-references to other pertinent pages]]

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