扩大到原来的100倍是21.8,将9.006的小数点去掉,这个数就 .
= ÷ = (填小数)
12÷ =0.75== :36= %
÷ =0.125=2÷ == %
: == ÷20= 折.
:20==0.8=24÷ =80%= 成= 折.