Floating Point
Need numbers with fractions (type float in C)
3.142
3.15576ten * 109
Scientific notation:
Normalized: no leading 0
Base 10:    +/- D.FFFF * 10exp
Base K:    +/- D.FFFF * Kexp
Base 2:    +/- D.FFFF X 2exp
Binary example
1.0 * 2-1 0.5ten
   binary point