-19971998,-9798,-19981999,-9899这四个数由小到大的排列顺序是()A.-19971998<-9798<-19981999<-9899B.-19981999<-1997199

题目简介

-19971998,-9798,-19981999,-9899这四个数由小到大的排列顺序是()A.-19971998<-9798<-19981999<-9899B.-19981999<-1997199

题目详情

-
1997
1998
-
97
98
-
1998
1999
-
98
99
这四个数由小到大的排列顺序是(  )
A.-
1997
1998
-
97
98
-
1998
1999
-
98
99
B.-
1998
1999
-
1997
1998
-
98
99
-
97
98
C.-
97
98
-
98
99
-
1997
1998
-
1998
1999
D.-
98
99
-
1998
1999
-
97
98
-
1997
1998
题型:单选题难度:偏易来源:不详

答案

-class="stub"1997
1998
=-class="stub"1998-1
1998
=-1+class="stub"1
1998

-class="stub"97
98
=-class="stub"98-1
98
=-1+class="stub"1
98

-class="stub"1998
1999
=-class="stub"1999-1
1999
=-1+class="stub"1
1999

-class="stub"98
99
=-class="stub"99-1
99
=-1+class="stub"1
99

又∵class="stub"1
98
>class="stub"1
99
>class="stub"1
1998
>class="stub"1
1999
(同分子的正分数,分母大的分数比较小)
-1+class="stub"1
98
>-1+class="stub"1
99
>-1+class="stub"1
1998
>-1+class="stub"1
1999
,即-class="stub"1998
1999
-class="stub"1997
1998
-class="stub"98
99
-class="stub"97
98

故选B.

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