Curiosity #1
1 x 8 + 1   =   ________________________________________  
12 x 8 + 2   =   ________________________________________  
123 x 8 + 3   =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
123456789 x 8 + 9   =   ________________________________________  




Curiosity #2
1 x 9 + 2   =   ________________________________________  
12 x 9 + 3   =   ________________________________________  
123 x 9 + 4   =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
                        + 10   =   ________________________________________  




Curiosity #3
9 x 9 + 7   =   ________________________________________  
98 x 9 + 6   =   ________________________________________  
987 x 9 + 5   =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
987654321 x 9 - 1   =   ________________________________________  




Curiosity #4
2 x 9 + 4   =   ________________________________________  
23 x 9 + 5   =   ________________________________________  
234 x 9 + 6   =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
  + 11   =   ________________________________________  
                        + 12   =   ________________________________________  




Curiosity #5
8 x 9 + 5   =   ________________________________________  
87 x 9 + 4   =   ________________________________________  
876 x 9 + 3   =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
    =   ________________________________________  
                              - 3   =   ________________________________________