三十亿七千零八万三千零四十一写作 ,省略亿位后面的尾数约是 .
:20==80%=20÷ = (填小数)
==12÷ = (填小数)
=0.75=( )÷8( )%=24:( )
= :0.8=0.75= ÷12= %.
: =6÷( )==0.75.