We're going to talk about subtraction using a number line to solve our problems.
The first problem we are going to solve is five minus two.
It is important to remember when you subtract you are going to move to the left on the number line.
Let's start at five.
As we move lets count the spaces...one, two.
We've landed on the number three.  The answer to five minus two is three.
Let's try another problem.  Our second problem is seven minus four.
Remember, when we subtract we will be moving to the left on the number line.
Let's start at 7.  We're going to count four spaces... one, two, three, four.
We've landed on the number three.
So seven minus four is three.
