问题
填空题
化简下列各数前面的符号. (1)-(+2)=______; (2)+(-3)=______; (3)-(-
|
答案
(1)-(+2)=-2;
(2)+(-3)=-3;
(3)-(-
)=1 3
;1 3
(4)+(+
)=1 2
.1 2
化简下列各数前面的符号. (1)-(+2)=______; (2)+(-3)=______; (3)-(-
|
(1)-(+2)=-2;
(2)+(-3)=-3;
(3)-(-
)=1 3
;1 3
(4)+(+
)=1 2
.1 2