In general, if A = [aij] and B = [bij] are two matrices of the same order, say m × n Then, the sum of the two matrices A and B is defined as a matrix C = [cij]m × n, where
cij = aij + bij, for all possible values of i and j Example 6  Given 
3
1
1
A
2
3
0

−
= 



 and 
2
5
1
B
1
2
3
2




= 

−



, find A + B
Since A, B are of the same order 2 × 3 Therefore, addition of A and B is defined
and is given by
2
3
1
5
1 1
2
3
1
5
0
A+B
1
1
2
2
3
3
0
0
6
2
2




+
+
−
+
+




=
=




−
+
+








ANote
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