Posted 08/24/2008 at 02:04:00am

Proof that 7 x 13 = 28
from the movie In the Navy starring Abbott and Costello

Proof:    

      Check #1:                 Check #2:

    
                 13                            13
                x 7                           ---
               -----                       7 /28 
                 21                           - 7  
                + 7                           ---
               -----                           21
                 28                          -21
                                               ----
                                                  0

      Check #3:

     
                 13
                 13
                 13
                 13
                 13
                 13
               + 13
             ------
                 28  (3+3+3+3+3+3+3) + (1+1+1+1+1+1+1)

    In Check #1, multiply 7 x 3 to get 21.
    Then multiply 7 x 1 to get 7. 
    Then add 21 and 7 to get 28.

    In Check #2, we check the multiplication
    problem by dividing one factor into the product.
    Divide 7 into 2 but it doesn't go.
    So divide 7 into 8 to get 1. 
    Subtract 7 from 28 to get 21.
    Now divide 7 into 21 to get 3. 
    So the answer is 13.

    In Check #3, another way to check a
    multiplication problem is by addition.
    To check if 7 x 13 = 28, we add seven 3s and seven 1s
    together to get 28.

No Offense, but you made this come to mind by

arguing math with a 6th grader!

You should expect a call from Jeff Foxworthy

or one of his game show producers...LOL!

HILLARIOUS!

BTW, how much hair do you have left after that argument?

ROFLMAO!