要使□64÷5的商是两位数,“□”中最大能填 ;要使605÷□的商中间有0,“□”中能填 .
5÷ =25%= :40= = 折.
÷25== = (小数)= %= 成.
12: == :4=0.25= 折.
=2: =4÷ = %=0.2.
12÷ = :12=0.75= = %