2+2=? 4-4=? 5+5=? 6-6=?

Question

2+2=? 4-4=? 5+5=? 6-6=?

Answer 1

2+2=4
4-4=0
5+5=10
6-6=0

Comments

2+2=4 ,4-4=0 ,5+5=10 ,6-6=0

Answer 2

4; 0; 10; 0. Are you serious?