要使687÷□5的商是两位数,□里最大填 ,要使□76÷27的商是两位数,□里最小填 .
9÷ =0.75== :36= %
6÷ = /16=0.25= :4= %
25÷ =6: =0.5.
: == ÷20═ %
=4÷ = :25= %