Answers

2014-04-14T10:12:03+05:30
Integers are collection of both positive,negative and zero numbers.
exercise-2+(7)=
3+(3)
(-3)-(-4)
2 3 2
2014-04-14T11:23:25+05:30
Integers are combination of  negative and posative no.s.
e.g-
[negative]-3,-2,-1,0,1,2,3[positive]
0