下列四個數中最小的數是( )
A.(-2012)×(-1)
B.(-1)÷(-2012)
C.(-20132)-1
D.(-1)-2013
【答案】
分析:根據有理數的乘除法有(-2012)×(-1)=2012;(-1)÷(-2012)=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/0.png)
;根據負整數指數冪的意義得到(20132)
-1=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/1.png)
;(-1)
-2013=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/2.png)
=-1,即可得到-1最小.
解答:解:∵(-2012)×(-1)=2012;(-1)÷(-2012)=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/3.png)
;(20132)
-1=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/4.png)
;(-1)
-2013=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/5.png)
=-1,
∴四個數中-1最�。�
故選D.
點評:本題考查了負整數指數冪的意義:a
-P=
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131022164913705154504/SYS201310221649137051545000_DA/6.png)
(a≠0,p為正整數).也考查了有理數的乘除法.