# Week 8 - Keyboarding - Binary Code

GARDEN SIGN-UP

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Binary Code

Computers do math. That's all they do.

Computers use only 2 numbers to do the math:

1 and 0

That's it--only 1's and 0's

Computers use what's called 'Binary Code' or 'Base 2' digital information. I remind the kids that 'BI' means 2--just as a BIcycle has 2 wheels which makes it easy to remember why the term 'Binary' means 2 numbers (0 and 1).

A computer can calculate the 1's and 0's at a rate of millions of times per second--and getting faster all the time.

What is truely amazing is that the computer, using different combinations of 1's and 0's can produce such a wide array of effects--words, pictures, animations, sounds, etc. As complex as this may sound it is really very simple. The combinations the computer uses to recognize/reproduce the first 7 alphabets are:

**A=01000001 **

B=01000010

C=01000011

D=01000100

E=01000101

F=01000110

G=01000111

Notice that for each letter the computer uses an 8 digit
combination of 1's and 0's. Every piece of information the computer produces is
an 8 digit combo. This is important to remember when we start talking later
about bits and bytes.

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**Place Value in Base Ten (our counting sytem): 0s-10s-100s-1000s-10000-10000-1000000-etc. but in reverse.**

**'Place Value' in Binary: 256-128-64-32-16-8-4-2 (that's all)**

See http://www.intel.com/education/transworks/index.htm

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**Student Activity** -- What's the number?

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**Hands On:**

Brain Pop Binary Activity at http://www.brainpop.com/technology/computers/binary/

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Password: philip

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