Binary subtraction | Number system

Binary Subtraction Explained | Clear Examples + 4-bit Subtraction Step-by-Step
Struggling to understand binary subtraction? This video explains everything you need to know about subtracting binary numbers — clearly, visually, and from the basics. Learn how computers perform subtraction using borrows, and how to subtract up to 4 binary digits with full logic explained.

📌 What’s Covered in This Video:
✅ What is binary subtraction?
✅ Binary subtraction rules (with borrow logic)
✅ Step-by-step examples with borrow tracking
✅ 2-bit, 3-bit, and 4-bit binary subtraction
✅ Real-world uses of binary subtraction in computers
✅ Common errors and how to avoid them

➕ Binary Subtraction Rules:
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0 − 0 = 0
1 − 0 = 1
1 − 1 = 0
0 − 1 = 1 (with a borrow from the next higher bit)
🧮 Borrow Logic Explained:
Just like in decimal subtraction, sometimes the digit on top is smaller than the one below. When that happens, we borrow a '1' from the next higher bit (just like borrowing 10 in decimal).
We clearly show how the borrow is passed through bits and how the result is calculated manually — not just with formulas, but with true understanding.
📚 Trusted References for Further Learning:
Khan Academy – Binary Subtraction Basics:
https://www.khanacademy.org/computing/computer-science/cryptography

GeeksforGeeks – Binary Subtraction Logic:
https://www.geeksforgeeks.org/binary-subtraction/

TutorialsPoint – Binary Arithmetic (Subtraction Included):
https://www.tutorialspoint.com/digital_circuits/digital_circuits_binary_arithmetic.htm

Electronics Tutorials – Binary Number Subtraction:
https://www.electronics-tutorials.ws/binary/bin_4.html

🎯 Perfect for:
High school and college students (Class 11–12, B.Tech, B.Sc)

Electronics and Computer Science learners

Competitive exam aspirants (GATE, ESE, etc.)

Anyone curious about how subtraction works in binary systems

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💬 Got doubts or want me to cover binary multiplication or division next? Drop a comment below!

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