把一块5公顷的地平均分成4块,每一块地占总面积的 . .(判断对错)
9÷ =0.75== :36= %
6÷ = /16=0.25= :4= %
25÷ =6: =0.5.
: == ÷20═ %
=4÷ = :25= %