                                         

                                         

                                          9                                

                                                     

          

                     

     

      

⑴ 9           18   

⑵            3        4    5      6           3+4+5+6=18   ⑴           1 2  

⑶    2         7    

  2.3.4.5 2.3.4.6 2.3.4.7 2.3.4.8 2.3.5.6 2.3.5.7 2.4.5.6

  14 15 16 17 16 17 17

  120 144 168 192 180 210 240

⑷    1        4      120          

  1.3.5.8 1.3.6.7 1.4.5.6 1.4.5.7

  17 17 16 17

  120 126 120 140

⑶⑷       120                

2.3.4.5;1.3.5.8;1.4.5.6

  1                               2.   3   4   5  

          