Theory

Binary Representation

• Binary is the base-2 number system, where numbers are represented using only 0s and 1s.
• Each digit in a binary number is called a 'bit'.
• Binary numbers can be converted to and from decimal numbers using place value.

Binary Conversion

• To convert a binary number to decimal, multiply each bit by its place value, then add the results.
• To convert a decimal number to binary, divide the decimal number by 2 repeatedly, recording the remainders, then read the remainders in reverse order.

Exam Tips

• Practice converting between binary and decimal numbers.
• Understand how to perform binary arithmetic operations like addition and subtraction.