How do you find the sum of 20 and 40?

Answer 1

-- Drop 20 pennies or little stones onto a small patch of bare ground.

-- Drop 40 more pennies or little stones onto the same place.

Do it carefully, so that you don't scatter them.

-- Pick up all of the pennies or little stones and count them.

The number you have is the sum of 20 and 40.

Answer 2

To find the sum of 20 and 40, you simply add the two numbers together. In mathematical terms, you would write it as 20 + 40 = 60. This is because addition is a basic arithmetic operation that combines two or more numbers to give a total or sum.