Harris said that 15 x 9 is equivalent to 45 x 3 because you can multiply one dimension by three and divide the other dimension by three. his partner said that only works when you double one number and halve the other. who is right? explain.

  Harris is right

Step-by-step explanation:

The factors in a product can be grouped any way you like. That is the meaning of the associative property of multiplication.

  15×9 = 15×(3×3) = (15×3)×3 = 45×3

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8