在比例a:1:b中,a和b一定互为倒数. .
93003500读作:____________________________;7450000读作:_____________________________;65031467读作:____________________________;48530927读作:____________________________。
80060400读作:________________________1600654读作:_________________________
60006000读作:____________________30507090读作:____________________80001600读作:____________________9004005读作:____________________
230000读作:________________________400000读作:________________________2500000读作:_______________________1660000读作:______________________
1689读作( ),16890000读作( )。