求答案,急!急!急!7-3/2-5/4-9/8-1

求答案,急!急!急!7-3/2-5/4-9/8-17/16-33/32-65/64求答案（用简便算法）

3个回答

7-3/2-5/4-9/8-17/16-33/32-65/64=7-(6/4+5/4)-(18/16+17/16)-(66/64+65/64)
=7-11/4-35/16-131/64=7-(44/16+35/16+131/64)=7-(79/16+131/64)=7-(316/64+131/64)
=7-447/64=1/64
望采纳!