Why this worked. Think about what we did, play around with some numbers, try to visualize it. HINT: If you have anything you can use to SHOW why it worked, try that. I recommend M&M's or a candy that has color. I suggest showing your number, and whats done to it in one color... 10 and what happens to that in another.

Think of a number 1-10
Double it
Add 10 to that number
Divide it by 2
Subtract your original number

Your answer is 5