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# AN INTRODUCTION TO BINARY.

To be used when intruducing the Binary system to KS2.
by

## James Holmes

on 28 April 2014

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#### Transcript of AN INTRODUCTION TO BINARY.

AN INTRODUCTION TO BINARY.
By James Holmes
@JholmesICT
Wessex Computing Project

Can computers talk?
Computers are not like us, they cannot talk with words. They can only use 1's and 0's.
0 = Off
1 = On

This system is called 'Binary'
How do we count?
We use a 'base 10' counting sequence.
(10 digits)
Because we
have 10 fingers!
We use the digits
0 - 9
We use columns!
10
0
10
1
10
2
10
3
U
T
H
Th
3
2
6
8
Revision
Let's revise the way that
we use numbers...
How do computers count?
Computers use a 'base 2' counting system.
(2 digits)
Because they only understand
'On' or 'Off'!
They use the digits
0 - 1
Binary uses columns!
1
2
4
8
1
2
2
2
3
2
3
2
0
1
0
0
What number is this?
What number is this?
1
2
4
8
2
0
2
1
2
2
2
3
What are these Binary values?

1. 0010
2. 1001
3. 0101
4. 1100
5. 0111
The value of each column doubles.
The value of each column multiplies by 10.
Full transcript