(49-1/8)1/8-(46-1/8)1/8-(43-1/8)1/8-……-(1-1/8)1/8
问题描述:
(49-1/8)1/8-(46-1/8)1/8-(43-1/8)1/8-……-(1-1/8)1/8
答
(49-1/8)1/8-(46-1/8)1/8-(43-1/8)1/8-……-(1-1/8)1/8=(49/8-1)-(46/8-1)-(43/8-1)-……-(1/8-1)=(49/8-46/8-43/8-……-1/8)+15=(49-46-43-……-1)/8+15=【49-(46+43+……+1)】/8+15=【49-(46+1)*1...