小数点右边第二位是百分位,计数单位是0.1. .(对的打“√”,错的打“×”)
1﹣1× =0 ÷ == : =75%
: =0.125= %==.
9÷ == :8=0.75= %= 折.
=0.375= ÷24= %
:20==0.8=12÷ = %.