Binary Arithmetic Operations | Cambridge IGCSE Computer Science 0984 | Full Lesson Pack

A COMPLETE 60-minute lesson pack for Cambridge IGCSE (9-1) Computer Science (Syllabus 0984) - covering Binary Arithmetic Operations including two’s complement representation, signed binary arithmetic, and overflow detection.

Difficulty: Medium. Prerequisites: Lessons 1 & 2.

PowerPoint Presentation (14 slides)

• Slate & Amber design — consistent with the series
• Full lesson flow: Retrieval starter → Objectives → Binary subtraction (borrow method) → Two’s complement (why & how) → Signed arithmetic → Signed overflow → Worked examples → Guided practice → Independent practice → Extension → Misconceptions → Exit ticket → Summary
• Column subtraction and addition tables with borrow/carry rows displayed
• Side-by-side positive and negative overflow examples
• Worked example cards with pre-calculated layout — no text overlap

Student Worksheet (13 questions, 6 pages)

• Built-in two’s complement quick reference table
• Sections A–D: binary subtraction, two’s complement, signed arithmetic, overflow
• Extension: multi-step processor simulation challenge
• Answer lines scaled to mark allocation

Full Answers & Mark Scheme (5 pages)

• Full column working shown for every subtraction and addition question
• M/A/B mark labelling, IGCSE conventions throughout

Exam-Style Practice Paper (10 pages, 26 marks, 30 minutes)

• 5 structured Paper 1 questions with command words
• Includes counter-example question on carry-out vs overflow
• Mark scheme on dedicated page

LEARNING OBJECTIVES (aligned to 0984)

• Perform binary subtraction using the column borrow method
• Explain why two’s complement is used to represent negative numbers
• Convert a positive binary number to its two’s complement negative
• Perform addition and subtraction using two’s complement representation
• Detect and explain overflow in signed binary arithmetic

SUITABLE FOR:

Cambridge IGCSE 0984 / 0478 · AQA/OCR/Edexcel GCSE Computer Science · Ages 14–16

two’s complement, binary subtraction, signed binary, binary arithmetic,
Cambridge IGCSE Computer Science, 0984, data representation, overflow,
negative numbers binary, GCSE computing, borrow method, sign bit,
binary addition subtraction, IGCSE 0478, signed overflow