3. Operations with Integers
Sign In
Addition can be thought of as moving to the right on a number line.
5
- 8 +13 To do so, remember that addition can be thought of as moving to the right on a number line. Therefore, adding 13 to - 8 is like moving 13 steps to the right of - 8.
We can check our answer by finding the sum of the given quantities in a calculator. Let's check our math!
We obtain the same result as before. Therefore, we were correct!
As we can see, we can apply operations between integers with same or different sign. Let's see what happens in each case.
| Sign | Operation | Result | Example |
|---|---|---|---|
| ++ | Addition | Positive sum | 4+4=8 |
| - - | Addition | Negative sum | - 4 + (- 8)= - 12 |
| ++ | Product | Negative Product | 4(4) = 16 |
| -- | Product | Positive product | (- 4)(- 4)=16 |
| ++ | Quotient | Positive quotient | 16/4=4 |
| -- | Quotient | Positive quotient | - 16/- 4=4 |
We need to be aware when the signs are different. In that case, we will have the following results.
For those of you who are interested in learning more about operations with integers, you can read more about them on the following pages.