網路城邦
回本城市首頁 優秀教育
市長:寧靜姐  副市長: AL
加入本城市推薦本城市加入我的最愛訂閱最新文章
udn城市情感交流親子家庭【優秀教育】城市/討論區/
討論區學習與記憶方式 字體:
上一個討論主題 回文章列表 下一個討論主題
數學好好玩
 瀏覽693|回應0推薦4

寧靜姐
等級:8
留言加入好友
文章推薦人 (4)

chiungchu
莘蒂
時和
華碩

數學好好玩 *@*    網路流傳 
 
     3 x 37 = 111
     6 x 37 = 222
     9 x 37 = 333
   12 x 37 = 444
   15 x 37 = 555
   18 x 37 = 666
   21 x 37 = 777 
   24 x 37 = 888
   27 x 37 = 999

  Nice one:
 
111,111,111  x  111,111,111 =  12,345,678,987,654,321

  Trapeze:
 
                             0x 9 + 1 = 1
                           
1 x 9 + 2 = 11
                          12 x 9 + 3 = 111 
                        123 x 9 + 4 = 1111
                      1234 x 9 + 5 = 11111
                    12345 x 9 + 6 = 111111
                  123456 x 9 + 7 = 1111111
                1234567 x 9 + 8 = 11111111 
              12345678 x 9 + 9 = 111111111
            123456789 x 9+10 = 1111111111

   another Trapeze:
                      
      1 x 8 + 1 = 9
                          12 x 8 + 2 = 98
                        123 x 8 + 3 = 987 
                      1234 x 8 + 4 = 9876
                    12345 x 8 + 5 = 98765
                  123456 x 8 + 6 = 987654
                1234567 x 8 + 7 = 9876543
              12345678 x 8 + 8 = 98765432 
            123456789 x 8 + 9 = 987654321

   and another one:

                                
   0x 9 + 8 = 8
                                  9 x 9 + 7 =
88
                                98 x 9 + 6 =
888 
                              987 x 9 + 5 =
8888
                            9876 x 9 + 4 =
88888
                          98765 x 9 + 3 =
888888
                        987654 x 9 + 2 =
8888888 
                      9876543 x 9 + 1 =
88888888
                    98765432 x 9 + 0 =
888888888
                  987654321 x 9 -  1 =
8888888888
                9876543210 x 9 -  2 =
88888888888  
 
回應 回應給此人 推薦文章 列印 加入我的文摘

引用
引用網址:https://city.udn.com/forum/trackback.jsp?no=51640&aid=1688953