Find the sum:

$\underline{\begin{array}{cc}& 4\\ +& 4\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 7\\ +& 4\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 8\\ +& 4\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 5\\ +& 4\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 8\\ +& 5\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 5\\ +& 5\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 9\\ +& 5\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 7\\ +& 5\\ & \end{array}}$

Find the sum.

$\underline{\begin{array}{cc}& 6\\ +& 7\\ & \end{array}}$