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作者 n19860423 在 PTT [ teaching ] 看板的留言(推文), 共50則
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6F推:題目的基準點不明確...09/10 22:33
1F→:"一又二分之三"這蓊寫法本身就有問題了..01/14 00:53
2F→: 種01/14 00:53
3F→:所以我覺得題目本身就有問題,就不用再去想是不是最簡01/14 00:54
1F推:http://ppt.cc/,D2u03/20 19:11
2F→:用BBS太難表達了~用軟體畫出來說明比較清楚XD03/20 19:12
3F→:這只用到畢氏定理~國中有學過~應該OK03/20 19:13
4F→:這題似乎是澳洲AMC還是什麼的競賽題出過的樣子XD03/20 19:13
2F推:我是 word的方程式編輯器+word繪圖+GSP繪圖 很夠用02/08 20:56
1F推:我也想要看看+1!!12/18 20:50
1F推:度要寫吧~養成好的計算習慣10/16 00:27
2F→:角度不要出太怪的數字,這樣很難判斷是不會測還是看錯10/16 00:28
6F推:可以跟學生說~要嘛都寫~或是都不寫(最後答案再寫)10/16 00:49
7F→:畢竟有度跟沒度意義不一樣10/16 00:49
2F推:A乘以2的2次方-1後應該是變2的256次方~09/18 17:57
3F→:即3A=2的256次方09/18 17:57
4F→:而不會出現(2的256次方-1)+(2的2次方-1)09/18 17:57
5F→:所以以原題來看,A=(2的128次方)/(根號3)09/18 17:58
1F推:把A先乘上(2的2次方-1)09/13 20:35
2F→:再利用(a+b)(a-b)=a平方-b平方09/13 20:36
5F推:題目可以變化吧~不一定是從2的1次方+1開始09/14 17:27
6F→:這題對國中生而言,只要他會(a+b)(a-b)=a平方-b平方09/14 17:27
7F→:還有分數有理化 就不算太難~只是答案醜了點09/14 17:28
8F→: 根式09/14 17:28
1F→:作A對y軸的對稱點A' 直線A'B和y軸的交點就是P02/28 18:11
1F推:我覺得現在小孩依賴性太高,也變得比較懶、沒行動力01/08 20:51
2F→:檢討考卷,名就算是自己錯的也不訂正,以為聽過就懂01/08 20:52
3F→:說"這是重點,抄起來!"01/08 20:53
4F→:還要我再說"欸~我要你們抄都沒在動,看戲阿!" 才懶懶的01/08 20:53
5F→:把筆拿出,不甘不願的寫 (這是我在學校看到的現象)01/08 20:54