挂钟3点钟敲3下,6秒敲完,那么9点钟敲9下, 秒敲完.
6÷ =9:12== = %
1.25= :8== %.
2= : =27÷ =.
最小质数除以最小合数,商是,化成小数是 ;0.75=9÷ ==18÷ =.
== ÷ == (小数)