Now we can't add another $100, since that will take us to $582, and we need to get to $512, so lets add $20....
$82+$100+$100+$100+$100+$20=$502
Okay, we're getting really close! Let's add $10.
$82+$100+$100+$100+$100+$20+$10=$512
(If you were to show your work on a number line, you would simply keep moving up by $100 until you couldn't anymore, and then move up by $20, and finally by $10, until we get to $512) __________________________________________ a simpler way to solve this...