其实0.9999999......不是约等于1，而是等于1

缺氧的爱

0.9999999...... != 0.3333333......+0.3333333......+0.3333333......

颓废

<img src="images/smilies/ohh.gif" smilieid="19" border="0" alt="" /> <img src="images/smilies/ohh.gif" smilieid="19" border="0" alt="" /> <img src="images/smilies/ohh.gif" smilieid="19" border="0" alt="" />

电光

0.999999........＝9*0.11111111........＝9*10/9&nbsp;&nbsp;（9乘以9分之10）＝1<br /><br />好像应该这样解吧

pgety

9*10/9&nbsp;&nbsp;（9乘以9分之10）＝1<br />识不识数啊

颓废

<img src="http://photo1.bababian.com/20070420/9700813675C0B449077E9892F0C1CE0B.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://photo1.bababian.com/20070420/9700813675C0B449077E9892F0C1CE0B.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

MySky

0.9999999......=0.3333333......+0.3333333......+0.3333333......<br /><br />这样是不对的。。。。。

leontan

厉害啊

sun10

0.3333.....=1/3么?<br />这个也是约出来的好不好

cscwsn

0.3333333333333333...=1/3?<br /><br />不会吧

往事如烟

厉害！