前3组选单挑一注

前3组选速查表：（胆8）

和值尾数0     1      2      3      4      5      6      7      8       9

跨度2         678                     789                    89.10                                   3  578                   689             78.10                   89.11   8.10.11                                                                                         568

    4                589            68.10           78.11   458   468     478                                                                    

     5       489              58.10           348     358     368    378                                                                      68.11                                                  6  389           48.10   238    248    258    268    278                                                                     58.11                                                           7        128    138    148    158    168    178                                                      38.10          48.11

    8  28.10         38.11                                            189                           9         28.11                                                            18.10                 10  18.11                                                                                  一、根据前一号码走势图选定一个胆码；确定要查的表；例如胆码8，查上表；

二、再根据前3和值尾数、跨度查表，就可以确定单挑一注；（极少情况下查表得到二注组合；可以

按照和值再单挑一注。）

三、在来不及预测跨度的情况下，根据胆码、和值尾数查表，可以得到三至五注组合；投注成本比较低；

四、可以将前3组选变为直选投注，胆码定位于前一，其它号码放在第二、三位.