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Needs help in problem

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.
----------------------------------------------------
+ 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

ASKER CERTIFIED SOLUTION

deighton

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mustish1

ASKER

x 0 1 2 3 4 5
0 0 0 0 0 0 0
1
2
3
4
5

i try. In the case of multiplication ist row is all zero:
0*0 =0

in 2nd row. Can you please tell me one more time the second row in the multiplication case

mustish1

ASKER

x 0 1 2 3 4 5
0 0 0 0 0 0 0
1 0 1 2 3 4 5
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

mustish1

ASKER

x 0 1 2 3 4 5
0 0 0 0 0 0 0
1 0 3
2
3
4
5

For 2nd row
1*0 = 0/6 =0
1*1 = 1/6 =
1*2 = 2/6 = 3 reminder
1*4 = 4/6 = 1 reminder
1*5 = 5/6 = 1 reminder

I made mistake

SOLUTION

GwynforWeb

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