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# Needs help in problem

Posted on 2011-09-16

Hi guys: Can any one please help me in that problem. I dont understand how this table is created ? Thanks.

Compute the following airthmetic problems in Z/8. Represent answer with the least positive representative of the appropriate equivalence class.

a. [3] + [7]

b. [2] . ([4] + [5])

Addition and multiplication tables for Z/6.

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+ 0 1 2 3 4 5

0 0 1 2 3 4 5

1 1 2 3 4 5 0

2 2 3 4 5 0 1

3 3 4 5 0 1 2

4 4 5 0 1 2 3

5 5 0 1 2 3 4

x 0 1 2 3 4 5

0 0 0 0 0 0 0

1 0 2 3 4 5 0

2 0 2 4 0 2 4

3 0 3 0 3 0 3

4 0 4 2 0 4 2

5 0 5 4 3 2 1