Evaluate the following conditions and state true or false
 
i) 34\(+\)(13 \(+\) 27) \(=\) (34 \(+\) 13)\(+\)27
 
ii) 4\(-\)(13\(-\)27) \(=\) (4\(-\)13)\(-\)27 
 
iii) 34 \(+\) (\(-\) 34) \(= 0\)
 
iv) 4 \(+ 0 = 0\)