1 = 0

Proof:
1 = 1 + (-1 + 1) + (-1 + 1) + (-1 + 1) + ....
  = (1 + -1) + (1 + -1) + (1 + -1) + (1 + -1) + ......
  = 0

kekekeke

>>7
Associative property of addition says a + (b + c) = (a + b) + c. This can be extended by induction in various ways to any finite sum, but not necessarily to infinite sums.