檢視近似值的原始碼

{| class="https://cn.bing.com/images/search?view=detailV2&ccid=BO0PEyAJ&id=249774EE97E75129B082F7413E2AFFC47E196EAD&thid=OIP.BO0PEyAJ4uX8ndN5FMVutQHaEq&mediaurl=https%3a%2f%2fts1.cn.mm.bing.net%2fth%2fid%2fR-C.04ed0f132009e2e5fc9dd37914c56eb5%3frik%3drW4ZfsT%252fKj5B9w%26riu%3dhttp%253a%252f%252fwww.zaoxu.com%252fuploadfile%252fimgall%252f108d5494eef01f3a29bf2b15a19625bc315d607cfa.jpg%26ehk%3dm0zpYEb76bVwFYtMeZxzkvMYVjuvmd35B2P35bLDCME%253d%26risl%3d%26pid%3dImgRaw%26r%3d0&exph=436&expw=692&q=%e8%bf%91%e4%bc%bc%e5%80%bc&simid=607991959114302316&FORM=IRPRST&ck=7057A8EBC7F8CF0AF5E114CF7F33B836&selectedIndex=5&itb=0&ajaxhist=0&ajaxserp=0" style="float:right; margin: -10px 0px 10px 20px; text-align:left"
|<center>'''近似值'''<br><img
src=" https://ts1.cn.mm.bing.net/th/id/R-C.04ed0f132009e2e5fc9dd37914c56eb5?rik=rW4ZfsT%2fKj5B9w&riu=http%3a%2f%2fwww.zaoxu.com%2fuploadfile%2fimgall%2f108d5494eef01f3a29bf2b15a19625bc315d607cfa.jpg&ehk=m0zpYEb76bVwFYtMeZxzkvMYVjuvmd35B2P35bLDCME%3d&risl=&pid=ImgRaw&r=0" width="280"></center><small>  圖片來自优酷</small> 
|}
数学概念

近似值是接近标准、接近完全正确的一个数字。通常，取近似数的方法有四舍五入法、退一法和收尾法（进一法）等。