396+512=908
Not clear what the point of the question was, you may want to adjust it.
396 + 825 = 1,221
It is: 512+34 = 546
The answer is 568
3 consecutive even integers whose sum is 396 are 130, 132 and 134.
400
The prime factorization of 512 is 29. There are infinite ways to get 512 as a sum or quotient of positive integers.
512 is a good estimate: the number is easy to work with - particularly if you remember that it is 2^9.
512
Since 214 is a bit over 200, and 182 is a bit below 200, you could reasonably estimate them both as being 200 and therefore the sum of the two would be approximately 400. The actual sum is 396, which is very close to 400.
8 is the same as the sum of the digits of its cube, 512.
512 and 6910 are integers so their sum is an integer, not an improper fraction.
255 and 257