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John L. Whiteman
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Modular Arithmetic (Number Line)
2
-1
1
-2
0
-3
2
-4
1
-5
0
-6
2
-7
1
-8
0
-9
0
0
1
1
2
2
0
3
1
4
2
5
0
6
1
7
2
8
0
9
Circles
Numbers
≡
mod
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