Method 1:
1. Add up all the numbers.
For example, if we want to find the average of 5, 10, and 15:
```
5 + 10 + 15 = 30
```
2. Divide the total by the number of numbers.
In this case, there are 3 numbers:
```
30/3 = 10
```
So the average of 5, 10, and 15 is 10.
Method 2:
1. Enter all the numbers into your calculator.
For example, if we want to find the average of 5, 10, and 15:
```
5
10
15
```
2. Press the "average" button.
The average button is usually located at the bottom of the calculator. It may be labeled as "AVG," "X̄," or "ˉX".
3. Read the result from the display.
The calculator will display the average of the numbers that you entered.
In this case, the calculator will display 10.
Here are some additional tips for working out averages on a calculator:
- Check the order of operations.
When working with averages, it's important to follow the order of operations. Adding numbers first before dividing will ensure you get the correct result.
- Enter numbers carefully.
Make sure to enter numbers correctly, especially numbers with decimal points. A single mistake could throw off the average.
- Label the display.
If your calculator has a display that can be labeled, you can label it with the average so that you can remember it later.
- Check the units.
Make sure that you're working with the same units when you're calculating the average. If you're mixing different units, you could get an incorrect result.
- Round your answer.
If necessary, you can round your answer to the nearest whole number or decimal point.
Hope that helps.