Re-arrange sutably and find the sum in each of the following.
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(vi) 
(i) 
- 
- 
= 
= 
(ii) 
- 
- 
- 
= 
- 
- 
= 
= 
(iii) 
+ 
+ 
- 
- 
= 
- 
= 
- 
= 
= 
(iv) 
+ 
- 
- 
+ 
= 
- 
+ 
= 
- 
+ 
= 
= 
(v) 
+ 
+ 
- 
= 
+ 
= 
- 
= 
= 
= 
(vi) 
+ 
+ 
+ 
+ 
- 
= 
+ 
+ 
- 
= 
= 
6