you would add -7.
76
its 30 because you add 8 and 7 then add it by itself or multiply it by 2**.**
(7*8)+(7+8) = 56+15 = 71
When you add 8 and 5 the sum will be 13. On the other hand when you add 6 and 7 the sum will be 13. That's why it's equal to 13.
It means to add. For example, if you are told to take the sum of 5 and 8, you would add them together.
You get the largest sum if you add all of the numbers.
4+7+5+6+8=30 30 is the only sum those numbers can add up to.
The sum of 1 and 7 is 8. That is, 1 + 7 = 8
You add two addends to get a sum. For example, in 3 + 5 = 8, 3 and 5 are addends, and 8 is the sum.
Just add the real part and the imaginary part separately.
11. Sum means to add 3+8=11
8 + 7 = 15