Since the communative property shows you can add or multipy in any order, this means you can add all three of these in a different order and still get the same answer.....For example, you can do $1.25 + $0.80 + $2.75 or you can switch it around and do it in another way
Try making a picture that include adding blocks to make a wall or a kid playing with building blocks.
Here you go! You actually said p(8) twice so I thought you meant Q(8). Please if the equations are wrong update me with the right equation