Answers

2016-02-09T20:09:32+05:30
+1+1-2
-1-2
=0
it is integers

1 3 1
2016-02-09T20:10:41+05:30
-1 and +1 will cut off each other.So remaining number is -2.Thus the answer is -2.
0
No that's  not the correct answer 
the answer is0
Yes now you are correct