□□□÷9的商是三位数,商的最高位上一定是1. .(判断对错)
36: =0.75== ÷40= 折.
0.375=== :64= %
( )+= ×=÷ = ﹣= :4=0.5.
÷ ==30: =1.2= %.
÷5=1.2==30: .