题目内容

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

(6))-|-1
1
3
|=-1
1
3

(7))|-7.2|-(-4.8)=7.2+4.8=12;
(8)|-0.75|÷|-1
1
2
|=
3
4
÷1
1
2
=0.5.
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