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We’re refreshing the questions on our KS3 and GCSE Computer Science subject knowledge assessment. The current version remains available. Updated questions will be available from 18 May 2026.

GCSE

Lesson 4 Binary subtraction

Curriculum > KS4 > Unit > Lesson

Learners will be introduced to the four rules of binary subtraction. They will then perform subtraction on a series of binary numbers.

Learning objectives

  • Perform subtraction in binary

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