Add the single digit numbers.
Adding three numbers involves two steps
We add the first two numbers; 6 + 3 = 9
Next we add the sum to third number; 9 + 4 = 13
We write down the result
Add the numbers
We add the three numbers by counting forward here. We start counting from the largest number 9 and the count forward 8 to get 17
and from 17, we further count forward 6 to get 23, which is the sum.