树的影长和它的高度成正比例. .
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()。