小数点右边第二位是 ,它的计数单位是 ,0.35里有 个这样的计数单位.
0.25= ÷8== : .
40: =8:10= /5= (填小数)
=18: = ÷40= [填小数].
==10÷ = ÷36.
:16= ÷ ==0.125.