Write the number that comes after.

$39$ _____.

Which number comes after $41?$

Which number comes after $44 ?$

Write the number that comes just after.
$47▢$

Number before $47$ is

Add the following numbers:

$\begin{array}{cccc}& 4& & 4\\ +& 2& & 4\\ & & & \end{array}$

Add the following  numbers:

$\begin{array}{cccc}& 2& & 0\\ +& 4& & 8\\ & & & \end{array}$

Write the digits in the correct place and then add:

$40+38$