The McGraw Hill 6th grade book series of games.
Instructions:
Find three coins of different sizes (e.g. quarter, nickle, penny). Flip each and record the head/tail value. Look up a number in Door A . Flip the three coins and do a look up in a number in Door B . Add them . Your opponent may challenge you. Look up the answer in the table on the next page. If you are right and your opponent didn't challenge you, you get a point. If you are right and your opponent did challenge you, you get two points. If you are wrong and your opponent challenged you, your opponent gets a point. If you are wrong and your opponent didn't challenge you, nobody gets a point. Your opponent plays next. 
 vals[0] 
 DecimalAdd 


 Coin tosses (largest to smallest):  TTT TTH THT THH HTT HTH HHT HHH


 Door A -45.3 -10.2 -0.02 0.7 3.1 11.3 31.7 81.1


 Door B -22.1 -1.3 -0.4 0.05 0.3 1.2 21.4 67.4

 
  On a different page so the players have to turn to it...  
 

 vals[0] 
 DecimalAdd 


 + -45.3 -10.2 -0.02 0.7 3.1 11.3 31.7 81.1


 -22.1 -67.4 -32.3 -22.12 -21.4 -19 -10.8 9.6 59


 -1.3 -46.6 -11.5 -1.32 -0.6 1.8 10 30.4 79.8


 -0.4 -45.7 -10.6 -0.42 0.3 2.7 10.9 31.3 80.7


 0.05 -45.25 -10.15 0.03 0.75 3.15 11.35 31.75 81.15


 0.3 -45 -9.9 0.28 1 3.4 11.6 32 81.4


 1.2 -44.1 -9 1.18 1.9 4.3 12.5 32.9 82.3


 21.4 -23.9 11.2 21.38 22.1 24.5 32.7 53.1 102.5


 67.4 22.1 57.2 67.38 68.1 70.5 78.7 99.1 148.5