4
-2 and -4 do that.
-103
2
1+178 2+177 3+176...
(5/2 + √17/2) ≈ 4.562, and(5/2 - √17/2) ≈ 0.438
19
Yes. If equals are added to equals, then the results of the additions are equal.
171
7.5516 and 70.4484 (approx)
2 and 3
When equals are added to equals, you don't necessarily get wholes. But whatever you do get, they're equal.
109, 5 and 2