# In this Section:

In this section, we review addition of single digit whole numbers, one of the most basic operations in math.
We will learn to perform this operation with whole numbers using a number line. The number line allows us to visually understand the
addition process. This will help us later on when we add more complicated numbers such as integers. Essentially, to add using a number
line we start at the left number of our problem and move right on the number line by the number of units being added.