Calculating an average is a useful skill. You simply add up all the numbers you're considering and then divide the total by how many numbers there are. For example, the average of 3, 4, and 5 is (3+4+5)/3 = 4. Do you have specific numbers you're working with? Or is there a context where you often need to find averages, like in grades or finances? I'd love to help further if you have more details!