按规律填空:1/1·1/2·2/3·2/4( )·( )·( )·( )

问题描述:

按规律填空:1/1·1/2·2/3·2/4( )·( )·( )·( )

1/1·1/2·2/3·2/4(3/5 )·(3/6 )·(4/7 )·(4/8 )