问题
填空题
化简下列各数: -(-68)=______ -(+3.8)=______ -[+(-3
-(+0.75)=______ +(-3)=______ -[-(+2)]=______ -(-
+(+6)=______ -[-(-2)]=______. |
答案
-(-68)=68;
-(+3.8)=-3.8;
-[+(-3
)]=31 2
;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
;-0.75;-3;2;1 2
;6;-2.3 5