In **subtraction**, you take something away. (It is opposite of **addition**. In addition, you add something on.)

**Example**

Look at this problem. A number is missing.

You need to find its value.

6 | - | = | 1 |

**Answer**

You can use subtraction. Here's how.

6 - 1 = 5

So the missing value = **5**

Check your answer:

6 - 5 = 1