Hello There!
Team Thunder -  Wins = 18
                           Looses = 8
                           Ties = 8
  18 + 8 + 8 = [tex]34[/tex]
Team Lightning -  Wins = 6
                             Looses = 8
                             Ties = 2
8 + 6 + 2 = [tex]16[/tex]
How many more is a key word to [tex]Subtract[/tex]
[tex]34 - 16 = 18[/tex]
Team Thunder played 18 more games that Team Lightning.
Hope this helped!