Sections:

In this section, we will be focused on number line addition. Specifically, we are reviewing addition with single digit whole numbers, one of the most basic operations in math. We will learn how to perform this operation with whole numbers using a number line. Let’s begin by defining the whole numbers.
Whole Numbers: {0,1,2,3,4,…}
The whole numbers begin with 0 and increase in increments of 1 indefinitely. The whole numbers can be used to count any number of objects. When we first start counting and adding whole numbers, we generally use some sort of visualization: fingers, apples, blocks, etc…
A number line can be drawn to provide a visual representation of the whole numbers: We can use a number line to visually understand the addition process. This will also help 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.
Example 1: Add 4 + 3 using the Number Line
We start at 4 on the number line (left most number in the addition problem)
We then move 3 units right to arrive at our answer of 7