题目内容
【题目】把下列各数分别填在相应的横线上:
1,-0.20, ,325,-789,0,-23.13,0.618,-2014,π,0.1010010001….
正数有:______________________________________________________;
分数有:______________________________________________________;
负数有:______________________________________________________;
正整数有:____________________________________________________;
非正数有:_____________________________________________________;
负整数有:_____________________________________________________;
非负数有:_____________________________________________________;
负分数有:_____________________________________________________;
非负整数有:___________________________________________________.
【答案】 1, ,325,0.618,π,0.1010010001…; -0.20, ,-23.13,0.618; -0.20,-789,-23.13,-2014; 1,325; -0.20,-789,0,-23.13,-2014; -789,-2014; 1, ,325,0,0.618,π,0.1010010001…; -0.20,-23.13; 1,325,0.
【解析】按照本题中给出的分类,结合各类型数的定义依次分析各个数的特征,得
(1) 1是正数;1是正整数;1是非负数;1是非负整数.
(2) -0.20是分数;-0.20是负数;-0.20是非正数;-0.20是负分数.
(3) 是正数; 是分数; 是非负数.
(4) 325是正数;325是正整数;325是非负数;325是非负整数.
(5) -789是负数;-789是非正数;-789是负整数.
(6) 0是非正数;0是非负数;0是非负整数.
(7) -23.13是分数;-23.13是负数;-23.13是非正数;-23.13是负分数.
(8) 0.618是正数;0.618是分数;0.618是非负数.
(9) -2014是负数;-2014是非正数;-2014是负整数.
(10) π是正数;π是非负数.
(11) 0.1010010001…是正数;0.1010010001…是非负数.
故本题应进行如下填写:
(正数) 1, ,325,0.618,π,0.1010010001…;
(分数) -0.20, ,-23.13,0.618;
(负数) -0.20,-789,-23.13,-2014;
(正整数) 1,325;
(非正数) -0.20,-789,0,-23.13,-2014;
(负整数) -789,-2014;
(非负数) 1, ,325,0,0.618,π,0.1010010001…;
(负分数) -0.20,-23.13;
(非负整数) 1,325,0.