Topic 1.2.53 min read
1.2.5 Compliments (1's and 2's)
1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means we transform every 1 bit into a 0 bit and every 0 bit into a 1 bit. 2's Complement: The 2's complement of a binary number is obtained by taking the 1's complement of the number
Choose Your Level
1.2.5 Compliments (1's and 2's)
What is it?
1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means we transform every 1 bit into a 0 bit and every 0 bit into a 1 bit. 2's Complement: The 2's complement of a binary number is obtained by taking the 1's complement of the number
In simple words
1.2.5 Compliments (1's and 2's) is a core idea in this chapter. Learn the meaning first, then the main parts, then one clear example.
Recommended for Class 10
Full school-level explanation
1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means we transform every 1 bit into a 0 bit and every 0 bit into a 1 bit. 2's Complement: The 2's complement of a binary number is obtained by taking the 1's complement of the number
Why it matters
Understanding 1.2.5 Compliments (1's and 2's) helps you answer definition, explanation, and application questions in this chapter.
Deeper understanding
Go deeper on 1.2.5 Compliments (1's and 2's): connect the definition to reasons, relationships, exceptions, and exam wording.
Exam focus
Key Point 1
Key Point 2
Key Point 3
Key Point 4
Exam focus
Quick revision
- 1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means w
For long answers on 1.2.5 Compliments (1's and 2's): define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- 1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means w
Common exam traps
- Do not write about 1.2.5 Compliments (1's and 2's) without a clear definition.
- Do not mix this idea with a neighbouring chapter concept.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not write about 1.2.5 Compliments (1's and 2's) without a clear definition.
- Mistake
Do not mix this idea with a neighbouring chapter concept.
- Mistake
Do not list facts without showing how they connect.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means w
1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means we transform every 1 bit into a 0 bit and
- Definition
- 1's Complement: The 1's complement of a binary number is obtained by toggling (inverting) all its bits. That means we transform every 1 bit into a 0 bit and
- Critical warning
- Do not write about 1.2.5 Compliments (1's and 2's) without a clear definition.
Did you understand this topic?
Your answer is saved with your learning record. It does not mark the topic as mastered.
Ready to test yourself?
You've completed the learning section.
Exam Practice
Define
Q1. Define 1.2.5 Compliments (1's and 2's).
Explain
Q2. Explain the main ideas in 1.2.5 Compliments (1's and 2's).
Example
Q3. Give one clear example of 1.2.5 Compliments (1's and 2's) and say why it fits.
Mistake
Q4. State one common mistake students make about 1.2.5 Compliments (1's and 2's).
Exam note
Q5. Write a short exam note on 1.2.5 Compliments (1's and 2's): definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.