A 1.2.1 Representing Data
This lesson introduces the number systems used to represent whole numbers: binary and hexadecimal, set against the decimal system students already use. Students describe how each system works by place value, and convert integers between binary, hexadecimal and decimal in every direction, showing their working. Storing text, images, sound and video in binary follows in A1.2.2. Last updated: 11 Jul 2026 This lesson is...