六年级同学春季植树91棵,其中9棵没活,成活率是91%. .(判断对错)
÷20==36: = 折= %.
÷15=0.8==16: = %
÷10==0.4= %= .
=== ÷32=35÷ .
= ÷ =60%= : = 小数.