[(-5)-(-1/3)+1/7]+(-105)=_数学解答

[(-5)-(-1/3)+1/7]+(-105)=

人气：474 ℃　时间：2020-05-27 06:44:22

解答

(-105)/[(-1/3)+(+1/5)-(-1/7)]
= (-105)/[(-35/105)+(+21/105)-(-15/105)]
=(-105)/[1/105]
=-1