Chapter 6.3, Problem 31PE

For Exercises 27-32, add or subtract the given matrices if possible. (See Example 3)

$A=\left[\begin{array}{cc}6& -1\\ 7& \frac{1}{2}\\ 2& \sqrt{2}\end{array}\right]B=\left[\begin{array}{cc}-9& 2\\ 6.2& 2\\ \frac{1}{3}& \sqrt{8}\end{array}\right]C=\left[\begin{array}{cc}11& 4\\ 1& -\frac{1}{3}\\ 1& 6\end{array}\right]D=\left[\begin{array}{ccc}2& 3& 8\\ -1& 6& \frac{1}{6}\end{array}\right]$

$B+D$