657÷□,要使商是三位数,□里最大填 ;要使商是二位数,□里最小填 .
9: ==3÷5.
3÷4==27: = (填小数)= %.
÷4==0.25= :8.
=9÷ = :8== (填小数)
3: ==15÷ = ×= (小数).