在420÷□中,要使商是三位数,除数最大填 ,商是两位数,最小填 .
9: ==3÷5.
3÷4==27: = (填小数)= %.
÷4==0.25= :8.
=9÷ = :8== (填小数)
3: ==15÷ = ×= (小数).