6
11
The sum is 1511.
1 + 4 = 5
The sum of 1/2 and 5/8 is 1 1/8
(-4) + (5) = 1 [positive one]
The sum of 75 plus 5 is 80.
The sum of the coefficients of the chemical equation SF4 + H2O + H2SO + HF is 1 + 2 + 1 + 1 = 5.
25
-1
The answer will be 21x + 1
500,000,500,000 is the answer.
'Sum' is pretty much a synonym for add, and 5+5 or 5 plus 5 is 10.