问题 填空题
化简下列各数:
-(-68)=______
-(+3.8)=______
-[+(-3
1
2
)]=______
-(+0.75)=______
+(-3)=______
-[-(+2)]=______
-(-
3
5
)=______
+(+6)=______
-[-(-2)]=______.
答案

-(-68)=68;

-(+3.8)=-3.8;

-[+(-3

1
2
)]=3
1
2

-(+0.75)=-0.75;

+(-3)=-3;

-[-(+2)]=2;

-(-

3
5
)=
3
5

+(+6)=6;

-[-(-2)]=-2.

故答案为:68;-3.8;3

1
2
;-0.75;-3;2;
3
5
;6;-2.

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