Binary to Denary Conversion Worksheet & Answer Key | KS3 / GCSE Computer Science

Help students develop confidence with number systems using this complete Binary to Denary Conversion lesson resource. Designed for KS3 Computing and GCSE Computer Science, this structured worksheet guides learners through the process of converting 8-bit binary numbers into denary values using place-value columns and clear step-by-step methods.
The resource follows a gradual learning approach, moving from retrieval practice and teacher modelling to guided questions, independent practice, exam-style tasks, and self-assessment activities. Students learn how to identify the correct binary place values, add the appropriate column values, and explain their reasoning clearly.

Included in this

• Student worksheet (approximately 60 minutes)
• Fully worked teacher answer key and marking guide
• Retrieval starter activity
• Guided and independent practice tasks
• Spot-the-mistake misconception activity
• Exam-style GCSE questions with mark scheme guidance
• Exit ticket and confidence reflection
• Optional stretch and challenge activities

Topics Covered
Binary and denary number systems
8-bit binary place values
Converting binary to denary
Showing and checking working out
Common student misconceptions
GCSE-style exam application questions
Binary representation in computers