How much is 5 plus 15?

The correct calculation for this problem involves simple addition. When you add 5 and 15 together, you combine the two quantities. This can be visualized as starting from the number 5 and counting up by 15.

Starting at 5, if you count forward 15 steps, you reach 20. Mathematically, this can be represented as:

5 + 15 = 20

This confirms that the sum of 5 and 15 is indeed 20. Understanding basic addition concepts is crucial, as they form the foundation for more complex mathematical operations.