1.1 · Lesson 2 of 6
Hexadecimal number system
Syllabus 1.1.2
What this lesson covers
- Convert between denary, binary and hexadecimal (up to 16-bit)
Key vocabulary
- Hexadecimal
- The base 16 number system, which uses the digits 0 to 9 and the letters A to F.
- Base 16
- A number system with 16 different digits, which is why hexadecimal needs the letters A to F.
- Nibble
- A group of 4 bits. One hexadecimal digit represents exactly one nibble.
- A to F
- The hex digits that represent the denary values 10 to 15.
- Hex place values
- Powers of 16: 1, 16, 256 and 4096, reading from right to left.
- Leading zero
- A 0 added to the left of a binary number so it fills a whole nibble or byte. It doesn't change the value.
- Remainder
- What's left over after dividing. The divide-by-16 method reads these from bottom to top to get the hex answer.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 7 terms
- Activity 1: Binary ↔ denary · 8 questions
- Activity 2: Denary → hex · 8 questions
- Activity 3: Hex → denary · 8 questions