$\"\"$

For adding matrices, their dimension should be equal.

First write the dimension of the matrix.

The dimensions of matrix C and D are $\"\"$ .

The operation C + D is possible. $\"\"$

Add the matrix C + D.

$\"\"$ (Substitute the values of C and D)

$\"\"$ (Add corresponding elements)

$\"\"$ (Simplify) $\"\"$

The value of C + D is $\"\"$ .