问题
解答题
计算: (1)-(+10); (2)-(-2); (3)-[-(+3)]; (4)-[-(-23)]; (5)|-(+2
|
答案
(1)-(+10)=-10;
(2)-(-2)=2;
(3)-[-(+3)]=3;
(4))-[-(-23)]=-(23)=-23;
(5))|-(+2
)|=21 4
;1 4
(6))-|-1
|=-11 3
;1 3
(7))|-7.2|-(-4.8)=7.2+4.8=12;
(8)|-0.75|÷|-1
|=1 2
÷13 4
=0.5.1 2