Answers

2014-08-13T12:06:28+08:00
(18)+(-11)+(3)= (7)+(3)
                    =10
0
2014-08-13T12:47:10+08:00
(18) + (–11) + (3) 
= 18 - 11 + 3
= 7 + 3
= 10
0