1-1 = ?

1-1=1-1 Duh?

emotional damage
i will SEND YOU TO JESUS

Many have made the same forum post and some people seems to stick to the fact that 1+1=3 and not 1+1=2.

21.

1 - 1 = 0

http://us.metamath.org/mpeuni/1m1e0.html

1-1 is the most copied level in Super Mario Maker, is what it is.

Start from
-20=-20
Write this as
25-45=16-36
Rewrite as
5^2−5×9=4^2−4×9
Add
81/4
on both sides:
5^2−5×9+81/4=42−4×9+81/4
These are perfect squares:
(5−9/2)^2=(4−9/2)^2
Take the square root of both sides:
5−9/2=4−9/2
Add 9/2
on both sides:
5=4

1-1=0. Imagine you have a chess pawn with you. It's only one in total. Because it's 1-1, you take away the chess pawn away itself, it's going to be nothing left. So the answer is 0.

And here I was thinking zero is a whole number.

ohhh I think the part where #27 goes wrong is when you take the "square root", since "the inverse of squared" is not a function