有理数﹣3的倒数是（　　）                                          ...

问题详情：

有理数﹣3的倒数是（　　）                                                                   

A．                           B．3                            C．﹣                       D．﹣3

【回答】

C

【考点】倒数．                                                                                 

【分析】两个数的乘积为1，那么这两个数互为倒数．                                   

【解答】解：（﹣3）×（﹣）=1．                                                     

所以有理数﹣3的倒数是﹣．                                                               

故选C．                                                                                            

【点评】本题考查倒数的定义：若两个数的乘积是1，我们就称这两个数互为倒数．   

知识点：有理数

题型：选择题