Duodecimal numbers

Duodecimal numbers

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Preface
Preface
Addition
Addition
Multiplication
Multiplication

Addition

  0 1 2 3 4 5 6 7 8 9 X H 10  
0 0 1 2 3 4 5 6 7 8 9 X H 10 0
1 1 2 3 4 5 6 7 8 9 X H 10 11 1
2 2 3 4 5 6 7 8 9 X H 10 11 12 2
3 3 4 5 6 7 8 9 X H 10 11 12 13 3
4 4 5 6 7 8 9 X H 10 11 12 13 14 4
5 5 6 7 8 9 X H 10 11 12 13 14 15 5
6 6 7 8 9 X H 10 11 12 13 14 15 16 6
7 7 8 9 X H 10 11 12 13 14 15 16 17 7
8 8 9 X H 10 11 12 13 14 15 16 17 18 8
9 9 X H 10 11 12 13 14 15 16 17 18 19 9
X X H 10 11 12 13 14 15 16 17 18 19 1X X
H H 10 11 12 13 14 15 16 17 18 19 1X 1H H
10 10 11 12 13 14 15 16 17 18 19 1X 1H 20 10
  0 1 2 3 4 5 6 7 8 9 X H 10  

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