510 + 810 = 1320
810 + 354 = 1164
3,410 :)
25 + 810 = 835. You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer.
800 + 10
The answer = 3450
512 + -14 + 312 = 810
44 + 555 + 211 = 810
800 + 10 = 810
103
103 + 300 = 403
103 + 500 = 603