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This is a ppt that is paired with a lesson on the binary system and it is used in computing.

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- 1. The Binary SystemBy Desiree Noland<br />Just how does that computer work???<br />
- 2. Key words<br />Digital<br />Binary System<br />Data<br />Base-10<br />Base-2<br />Switch (Electronics)<br />
- 3. Let’s pull it apart<br />Bi:<br />Bi-cycle<br />Bi-focals<br />So Bi means “two”<br />Nary<br />Dictionary definition:<br />“Not one”<br />Binary=<br />two not one<br />
- 4. What is the binary system and how is it used in computing?<br />We use number systems everyday.<br />Hold up your hand-how many fingers do you see?<br />TEN! We use a base-10 number set<br />Base-10 has 0,1,2,3,4,5,6,7,8,9<br />Our computers uses a number set too-the binary system!<br />
- 5. Electronics-How do they work?<br />On<br />Off<br />
- 6. Computers and circuits are in 2 states:<br />On<br />Off<br />This is encoded by the Binary System! The Binary System tells computers and circuits which wires need to be on and which need to be off.<br />
- 7. Binary System:<br />Number system computers use at the most basic levels.<br />It is made of:<br />0<br />1<br />It is also called the Base-2 system because it has 2 numbers<br />
- 8. But how does it work???<br />Base-10 or the decimal system<br />0,1,2,3,4,5,6,7,8,9<br />Base-2 or Binary system:<br />0,1<br />0=Off and 1=On<br />
- 9. Binary System<br />0, 1<br />10, 11<br />100, 101, 110, 111<br />1000, 1010, 1011, 1100, 1101, 1110, 1111<br />All data is stored as binary numbers<br />
- 10. Binary System<br />Binary numbers are created by powers of 2 because there are only 2 numbers in the binary system<br />“Binary uses two digits, so each column is worth twice the one before.”<br />1,2,4,8,16,32…<br />
- 11. Let’s try it…<br /> 2ᶦ 2² 2ᶾ 2⁴ 2⁵<br />1 2x1 2x2 2x2x2 2x2x2x2 2x2x2x2x2<br />1 2 4 8 16 32<br />Now turn 17 into a binary number…<br />17 falls between 16 and 32<br />
- 12. Turning decimal into binary…<br />16 8 4 2 1<br />1 0 0 0 1<br />16 + 0 + 0 + 0 + 1 = 17<br />17 in binary form is:<br />10010<br />
- 13. Binary System<br />“Binary is an effective number system for computers because it is easy to implement with digital electronics”<br />All circuits are either switched on or off<br />
- 14. Let’s work it out…<br />Can you guess this binary numbers decimal form?<br />0100<br />
- 15. How do I do that?<br />0 1 0 0<br /> 4x1 2x0 1x0<br /> 4 + 0 + 0 = 4<br />The decimal number for 0100 is 4 !<br />
- 16. Now let’s try it the other way…<br />Can you figure out this base-10’s binary number?<br />20<br />
- 17. How do I do that?<br />32 16 8 4 2 1<br /> 20<br /> 1 0 1 0 0<br /> 1x16 0x8 1x4 0x2 0x2<br /> 16 + 0 + 4 + 0 + 0 = 20<br />The binary number for 20 is 10100!<br />
- 18. Great!<br />What numbers are in the base-2 or binary number system<br />0,1<br />Why do we use this system in computers?<br />We use it because computers are in 2 states-on or off- 1 or 0.<br />
- 19. Resources and References<br />Coffey, Neil. (2008). Introduction to Binary Numbers. Javamex. Retrieved September 9, 2011, from http://www.javamex.com/tutorials/arithmetic/binary.shtml<br />Kadar, Avraham. (1999). Binary. BrainPop. Retrieved September 9, 2011, from http://www.brainpop.com/technology/computersandinternet/binary/preview.weml<br />Mattson, Barbara. (2004, November 17). Detective Digit and the Slap Happy Computer Caper. NASA’s Imagine the Universe! September 9, 2011, from http://imagine.gsfc.nasa.gov/docs/teachers/lessons/slap/slap_main.html<br />Redshaw, Kerry. (1996). Binary-So Simple a Computer Can Do It. Pioneers@KerryR.net. Retrieved September 9, 2011, from http://www.kerryr.net/pioneers/binary.htm<br />Swanson, W. (2002). Introduction to Binary Numbers: How Computers Store Numbers. Swanson Technologies. Retrieved September 9, 2011, from http://www.swansontec.com/binary.html<br />

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