题目内容
计算:
(1)-(+10); (2)-(-2); (3)-[-(+3)]; (4)-[-(-23)];
(5)|-(+2
)|; (6)-|-1
|; (7)|-7.2|-(-4.8); (8)|-0.75|÷|-1
|.
(1)-(+10); (2)-(-2); (3)-[-(+3)]; (4)-[-(-23)];
(5)|-(+2
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
(1)-(+10)=-10;
(2)-(-2)=2;
(3)-[-(+3)]=3;
(4))-[-(-23)]=-(23)=-23;
(5))|-(+2
)|=2
;
(6))-|-1
|=-1
;
(7))|-7.2|-(-4.8)=7.2+4.8=12;
(8)|-0.75|÷|-1
|=
÷1
=0.5.
(2)-(-2)=2;
(3)-[-(+3)]=3;
(4))-[-(-23)]=-(23)=-23;
(5))|-(+2
| 1 |
| 4 |
| 1 |
| 4 |
(6))-|-1
| 1 |
| 3 |
| 1 |
| 3 |
(7))|-7.2|-(-4.8)=7.2+4.8=12;
(8)|-0.75|÷|-1
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
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