If we say that a building is 8m tall to the nearest metre, then we can conclude that in reality the building is anything between 7.5m and 8.5m tall. We say that 7.5m is the **lower bound** for the height of the building and 8.5m is the **upper bound **for the height of the building.

**Example**

**Exercise**

Let’s complete exercise 8:

The answers are below: