因为0.8=0.80,所以它们的计算单位也一样. .
12: ==0.25= %= ÷24= 折.
25%=== :20= (填小数)
: =40 =80%= ÷40.
填上适当的数.7÷13= = ÷÷7= 9cm=dm.
=12: =0.75= %