问题
解答题
(1)-[-(+2)]=______ (2 )-[-(-2007)]=______ (3)-[+(-27)]=______ (4)-{+[-(+
|
答案
(1)-[-(+2)]=-(-2)=2;
(2 )-[-(-2007)]=-2007;
(3)-[+(-27)]=-(-27)=27;
(4)-{+[-(+
)]}=-(-2 3
)=2 3
.2 3
故答案为:(1)2;(2)-2007;(3)27;(4)
.2 3