Page 6 - PPT 5
P. 6

 4. The product of



                 the numbers does



                 not change even if



                 we change the


                 order of the



                 numbers.



             Example: 2x (4x5)



                 =(2 x 4)x 5
   1   2   3   4   5   6   7   8   9   10   11