解:3、08亿等于( 30800 )万
∵1亿 = 1 × 100000000 = 100000000
∴3.08亿 = 3.08 × 100000000 = 308000000
∵10000 = 10000 ÷ 10000 = 1万
∴308000000 = 308000000 ÷ 10000 = 30800万
答:3、08亿等于30800万
3、08亿=(30800)万
解:3、08亿等于( 30800 )万
3.08=3.08万
3.08亿=30800万
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