How do you find the grade average of 4 grades?

Answer 1

You add the 4 numbers altogether and then divide the sum by 4.

Example:

1. there are four numbers: 10, 20, 12, 10

2. Add the numbers: 10+20+12+10= 52

3. Divide the sum by the total amount of numbers which is 4: 52/4

Answer/Average: 13