设a=“0.474747.........”,扩大100倍!!100a=“47.47474747.........”=47+“0.474747......”,即100a=47+a,解出来得a=47/99.
如果是0.123123123.....求分数呢?扩大1000倍!!!!!
如果是0.123412341234......求分数呢?扩大10000倍!
如果是0.10278787878......求分数呢?"0.10278787878787....."=0.102+"0.00078787878787......."=黑呀伊尔亚