8又2/1+4又4/1+2又8/1+12又3/1+6又6/1+3又12/1+16又4/1+8又8/1+4又16/1
=(8+4+2+12+6+3+16+8+4)+(1/2+1/4+1/8+1/3+1/6+1/12+1/4+1/8+1/16)
=63+[(1/2+1/4+1/8+1/4+1/8+1/16)+(1/3+1/6+1/12)]
=63+(21/16+7/12)
=63+(7/4)×(3/4+1/3)
=63+(7/4)×(13/12)
=63又48分之91
题目中几分之几写反了
原式=(8+4+2+12+6+3+16+8+4)+(1/2+1/4+1/8+1/3+1/6+1/12+1/4+1/8+1/16)
=63+[(1/2+1/4+1/8+1/4+1/8+1/16)+(1/3+1/6+1/12)]
=63+(21/16+7/12)
=63+(7/4)×(3/4+1/3)
=63+(7/4)×(13/12)
=63又48分之91
如果能帮到你,记得采纳,O(∩_∩)O~