(1)八万三千零八写作:83008;
(2)一千零一十万二千写作:10102000;
(3)六亿零七千写作:600007000;
(4)五百六十亿零三万写作:56000030000;
(5)814200读作:八十一万四千二百;
(6)108078000读作:一亿零八百零七万八千;
(7)200003050读作:二亿三千零五十;
(8)603000004读作:六亿零三百万零四;
故答案为:83008,10102000,600007000,56000030000,八十一万四千二百,一亿零八百零七万八千,二亿三千零五十,六亿零三百万零四.