Jawapan

2016-06-12T18:13:36+08:00
-2 - 2(-2)
= -2 -(-4)
= -2 +4
= 2

3 -2(3)
= 3 -6
= -3

-(-2) +2(-2)
= 2 -4
= -2

-(3) +2(3)
= -3 +6
= 3
1 5 1