题目内容
(1)-[-(+2)]=______
(2 )-[-(-2007)]=______
(3)-[+(-27)]=______
(4)-{+[-(+
)]}=______.
(2 )-[-(-2007)]=______
(3)-[+(-27)]=______
(4)-{+[-(+
| 2 |
| 3 |
(1)-[-(+2)]=-(-2)=2;
(2 )-[-(-2007)]=-2007;
(3)-[+(-27)]=-(-27)=27;
(4)-{+[-(+
)]}=-(-
)=
.
故答案为:(1)2;(2)-2007;(3)27;(4)
.
(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 |
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