12/( )=3÷5=( )30=15÷_=_(小数)
问题描述:
=3÷5=12 ( )
=15÷______=______(小数) ( ) 30
答
=3÷5=12 20
=15÷25=0.6(小数).18 30
故答案为:20,18,25,0.6.