Binary

• Computing
• Lower Secondary (Key Stage 3)

How do you think computers understand human input?

What is the following in denary, thirty three thousand four hundred and sixty two?

1. 333462
2. 303462
3. 33462
4. 3340062

We understand our basic decimal system is based on the next step being a x10 jump.

units x10 tens x10 hundreds x 10 thousands ....

This is a denary/base 10 system meaning we have 10 options available 0-9, before we need a new digit.

Th	Hu	Tn	U
4	5	3	2

What does denary mean?

1 KM
1 METRE
1 CM
1000 MM

1000 METRES

10 MM

1 METRE

100 CM

The exception to the *1000 scale is bit to byte!!!

Bits and bytes are not the same

1 byte = 8 bytes

Where before we multiple or divide by 1000 for bits and bytes we do the same operation but with 8

So this is what a size of 2 GB really means: it is a total of

Smallest

Largest

Organise the objects by size from smallest to largest

Megabyte

Terabyte

Gigabyte

Kilobyte

Byte

What is binary?

8

4

2

1

How do you think a computer says the number 1?

1

0

0

0

1 Metre	1000 mm
1 Kilometre	1000 m
1 Kilogram	1000 g
1 Litre	1000 ml