把下列各数填入相应的数集内:-100,+12,313,-27,0.01,68,-10%,0,18‰,-214,2.0,0.?4?5,π.正有理数集:{};负有理数集:{};整数集:{};分数集:{};自然数集:{};-数学

题文

把下列各数填入相应的数集内:
-100,+12,3
1
3
,-
2
7
,0.01,68,-10%,0,18‰,-2
1
4
,2.0,0.
?
4
?
5
,π.
正有理数集:{                                                 };
负有理数集:{                                                 };
整  数  集:{                                                 };
分  数  集:{                                                 };
自 然 数集:{                                                 };
非 负 数集:{                                                 }.
题型:解答题  难度:中档

答案

正有理数集:{+12,3
1
3
,0.01,68,18‰,2.0,0.
?
4
?
5
};
负有理数集:{-100,-
2
7
,-10%,-2
1
4
};
整  数  集:{-100,+12,68,0,2.0};
分  数  集:{3
1
3
,-
2
7
,0.01,-10%,18‰,-2
1
4
,0.
?
4
?
5
};
自 然 数集:{+12,68,0,2.0};
非 负 数集:{+12,3
1
3
,0.01,68,0,2.0,0.
?
4
?
5
,π}.

据专家权威分析,试题“把下列各数填入相应的数集内:-100,+12,313,-27,0.01,68,-..”主要考查你对  有理数定义及分类  等考点的理解。关于这些考点的“档案”如下:

有理数定义及分类

考点名称:有理数定义及分类

  • 有理数的定义:
    有理数是整数和分数的统称,一切有理数都可以化成分数的形式。

  • 有理数的分类:
    (1)按有理数的定义:
                                  正整数 
                     整数{     零 
                                  负整数
    有理数{     
                                正分数 
                    分数{
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