(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7) 等于多少?
问题描述:
(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7) 等于多少?
答
(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7)
=-31/6+7/4-23/6+88/7-88/7
=-31/6+7/4-23/6+(88/7-88/7)
=-31/6+7/4-23/6
=-31/6-23/6+7/4
=-(31/6+23/6)+7/4
=-54/6+7/4
=-9+7/4
=-36/4+7/4
=-29/4
答
(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7)
=-31/6-23/6+7/4+88/7-88/7
=-9+7/4
=-29/4