8+y is the sum of 8 and y
The sum of 9 and 5 is 14
The sum of 19 and 9 is 28.
The sum of 1 + 8 is 9.
The sum of 14 and 9 is 23.
The sum of fluorine is 9, as it has an atomic number of 9.
the sum is the answer to an addition problem e.g.4+5=9 9 is the sum
9, 18, 27, ... All numbers whose digital sum is 9. A digital sum is the sum of all the digits of a number. If the sum happens to be greater than 9 then repeat the process of obtaining a digital sum until the result is 9 or smaller.
9+a.
The sum of 8, 11 and 9 is 28.
-23 is the sum of -32 and 9
135 is the sum