题目内容

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