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:{     

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:{     

题型:解答题难度:一般来源:不详
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:{                                                 }.
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}.
举一反三
把下列各数填在相应的大括号里.
+8,+
3
4
,0.275,2,0,-1.04,
22
7
,-8,-100,-
1
3
0.
3

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(2)负整数集合{______}
(3)正分数集合{______}
(4)负分数集合{______}.
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设m是不能表示为三个互不相等的合数之和的最大整数,则m=______
题型:填空题难度:一般| 查看答案
关于x的方程kx2-(k-1)x+1=0有有理根,求整数k的值.
题型:解答题难度:一般| 查看答案
下列说法错误的是(  )
A.最大的负整数为-1
B.倒数等于它本身的数有±1,0
C.绝对值最小的有理数是0
D.相反数是它本身的数是0
题型:单选题难度:简单| 查看答案
给出下列各数:-3,0,+5,-3.1,+3.1,-0.5,2010.其中是负整数的有(  )
A.0个B.1个C.2个D.3个
题型:单选题难度:简单| 查看答案
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