12/( )=3÷5=( )30=15÷_=_(小数)

问题描述:

12
(    )
=3÷5=
(     )
30
=15÷______=______(小数)

12
20
=3÷5=
18
30
=15÷25=0.6(小数).
故答案为:20,18,25,0.6.