## Integers and the Number Line

**The Number Line**

All numbers can be found on a line called the "Number Line". This line goes on forever and ever in both directions and has no ending. Zero is the middle point on the line. On the right side of zero are all the positive numbers. In other words, the numbers

*. On the left side of zero are all the negative numbers. Another way to say this is that the numbers*

**increase****. 2 and -2 are called "Opposites" because they are the same number of places from 0 on the number line but in different directions. The "Absolute Value" of a number is the amount of places from zero the number is. 4 is 4 places from 0, so 4 has an**

*decrease**absolute value*of 4. The

*absolute value*of -8 is 8, because it is 8 places from 0. There are several ways to display a number line. Below are some examples.

Multiplication & Division

- The rules are the same for both Multiplication & Division
- If the signs are the same- the answer is Positive;
- If the signs are different- the answer is Negative