Burt Kaliski Jr. (@modulomathy)

4/9/12 8:19 AM

#math trivia for #April9: In _signed decimal_, digits have values from -10 to +9. What’s another way to represent #100 in this notation?

The usual way to represent 100 is with unsigned digits:

100 = 1*10^2 + 0*10^1 + 0*10^0

Another way to represent 100 is with signed digits. The negative digits offset the positive ones. For example:

100 = 2*10^2 + (-10)*10^1 + 0*10^1

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