刘阿姨的身份证号码是612123197810150385,她的生日是( 月 )
9÷ == :8= (填小数)
20: = ÷20==0.8= %
==36÷ = (填小数)
18: =0.25= %= ÷24=.
2.5==50÷ = ÷50.