Page 20 - Prim 5 - 2nd Term - 2024-2_Neat

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Lesson 3 (Enrichment)

An introduction to binary numbers

Binary numbers system
• Computers only understand information by this system.
• Computers are simple and efficient. Just like a light switch.

Binary numbers system
1 0
also means (YES or ON) also means (NO or OFF)
➢ Binary number system is used to:
1. Send information.
2. Receive information.
3. Store information.
• Binary numbers system is used by digital devices like computers, phones and

calculators.
➢ Humans use the decimal system to communicate
• The decimal system also called Base ten system.

• The decimal system has ten unique numerals (0-9).
• Once we count past the number nine, we add one of the ten unique number symbols
as a digit on the left.
• Counting from the right, each place represents a value ten times as big as the previous
one.
Example: to get a number such as “157” (multiply the right-most
number by 1, multiply the middle number by ten, and multiply the left number by 100).

➢ Just like the decimal system, when binary runs out of unique digits, it adds a digit
on the left.

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