[+Before we begin, let's review the '''decimal''' number system. Why does 453 represent 453? (Silly question, I know...but there is a point!)+] --->[+++453 = (4 x 100) + (5 x 10) + (3 x 1)+++] ---- [+'''Group activity!'''+] * [+Using your cards, figure out the highest number possible you can represent+] * [+Count from 0 to the highest number using the cards. What pattern, if any, do you notice?+] * [+Is there more than one way to get any number?+] * [+What happens when you put a zero on the left of a binary number? What happens when you put a zero on the right of a binary number?+] * [+'''Expert challenge:''' Try making the numbers 1, 2, 3, and 4 in order again. Can you work out a logical and reliable method of flipping the cards to increase ANY number by 1?+] ---- [+'''An awesome Kahn Academy video!'''+] http://www.youtube.com/watch?v=ku4KOFQ-bB4 ---- [+'''Related topics:'''+] * [+%newwin%[[https://s-media-cache-ak0.pinimg.com/564x/fa/3f/8b/fa3f8b032f1df211cfa5a226b973f0e8.jpg|Hexadecimal]] (%newwin%[[http://kkfscs.weebly.com/cs-colors.html|Color Charts]])+] * [+%newwin%[[http://upload.wikimedia.org/wikipedia/commons/1/1b/ASCII-Table-wide.svg|American Standard Code for Information Interchange (ASCII)]] (%newwin%[[http://www.tamucc.edu/wiki/SeanBritt/ASCII|Try it out!]])+] * [+ %newwin%[[http://docstore.mik.ua/univercd/illus/4/84/48684.gif|A helpful chart that can't be used on the test!]]+]