A = [ 1 0 3 ] + B = [ 4 5 6 ] for a 3X1 matrix and of course get a result of [ 5 5 9 ]. . .

OK, so let me try to restate this in more general terms:

You have matrix A and matrix B of some dimensions. If and only if the dimensions of A match the dimensions of B, then the sum of the two matrices (matrix C) is the sum of each element in A added to the corresponding sum of B - this sum is placed in the corresponding element of C.

Can you take this general idea and make it into a program?