tag:blogger.com,1999:blog-3550204829234352390.post7479648813828326303..comments2024-03-27T09:13:48.546+08:00Comments on 研發養成所 ( Bridan's Blog - 4rdp, For R&D Person ): 訓練數學感 162 ─ 0.1(97 ) 化為分數Bridanhttp://www.blogger.com/profile/17055047757114667099noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3550204829234352390.post-28522075324474243472018-02-06T19:41:48.292+08:002018-02-06T19:41:48.292+08:00謝謝西瓜補充代數解法,國中程度以上可以理解原理。謝謝西瓜補充代數解法,國中程度以上可以理解原理。Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-38678113133962140212018-02-06T13:15:17.753+08:002018-02-06T13:15:17.753+08:00徒法煉鋼!
令0.1979797...=x
則19.7979797...=100x
下式減上式
1...徒法煉鋼!<br />令0.1979797...=x<br />則19.7979797...=100x<br /><br />下式減上式<br />19.6=99x<br />x=196/990=98/495.https://www.blogger.com/profile/16677804023065232981noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-19668334002893468342018-02-05T21:26:11.101+08:002018-02-05T21:26:11.101+08:00香港孫老師私訊我,提供一個好記憶的解法,稱為 ob method,https://photos.ap...香港孫老師私訊我,提供一個好記憶的解法,稱為 ob method,https://photos.app.goo.gl/waY0IQ5fSzIUIroE3<br /><br />老師說明由來為:這是去年我看到的數學工作紙上的一道帶星號的思考題。因傳統方法太無聊,我為求令學生快速記住並得出答案,便創造了這個方法,美其名曰ob method<br />Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.com