The basics of any electronic device means either electricity is flowing or it is not i.e. a switch is either on or off Computers are electronic devices.

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Presentation transcript:

The basics of any electronic device means either electricity is flowing or it is not i.e. a switch is either on or off Computers are electronic devices and work on the same basis

So, if only 1s and 0s are used then the number system is based on 2 aka it is a bi(two)nary system A number is also known as a digit. In the binary system, this would be called a binary digit. Shorten this to bit Binary

V Decimal Binary Thousands Hundreds Tens Units 128 64 32 16 8 4 2 1 When learning basic Maths in primary school, decimal tables are sometimes used like we see above where each column is multiplied by 10 (denary or dec(ten)imal) In the same way, a binary system multiplies by 2 as shown here. Usually, computers work in groups of 8 bits (8 columns as shown here). This is known as a byte 128 64 32 16 8 4 2 1 Binary

Decimal = 4752 90 341 Thousands Hundreds Tens Units 4 7 5 2 9 3 1 3 1 = 4752 90 341 Easy enough!!

Binary = ? 128 64 32 16 8 4 2 1 Have students work these out. Answers: = ? Have students work these out. Answers: 90 58 200