Chapter Overview
Factorisation belongs to the Algebra unit of CBSE Class 8 Mathematics. This guide is a local revision companion for the official NCERT/CBSE textbook chapter. Read the textbook first, then use this page to revise the exam-facing points.
Class 8 Mathematics strengthens algebra, number sense, mensuration, graphs, and proportional reasoning. Clean steps matter as much as the final answer.
What You Must Know
| No. | Focus Area | How to Study It |
|---|---|---|
| 1 | basic concept and definition | Learn the idea, practise one example, and prepare one exam-ready answer. |
| 2 | standard formula or rule | Learn the idea, practise one example, and prepare one exam-ready answer. |
| 3 | NCERT solved examples | Learn the idea, practise one example, and prepare one exam-ready answer. |
| 4 | exercise problem patterns | Learn the idea, practise one example, and prepare one exam-ready answer. |
| 5 | step-by-step answer presentation | Learn the idea, practise one example, and prepare one exam-ready answer. |
NCERT Reading Method
1. Read the chapter once to understand the main idea. 2. Mark definitions, formulas, examples, activities, diagrams, maps, characters, or grammar rules. 3. Solve in-text and exercise questions without copying. 4. Compare your answer with the textbook idea and correct missing keywords. 5. Reattempt wrong questions after one day.
Important Points
- basic concept and definition: understand the meaning, one example, and one likely exam question.
- standard formula or rule: understand the meaning, one example, and one likely exam question.
- NCERT solved examples: understand the meaning, one example, and one likely exam question.
- exercise problem patterns: understand the meaning, one example, and one likely exam question.
- step-by-step answer presentation: understand the meaning, one example, and one likely exam question.
Answer-Writing Tips
- Write the given information before solving.
- Use the correct formula or rule.
- Show each calculation step.
- Check signs, units, and final statement.
- Practise wrong questions again after one day.
Common Mistakes to Avoid
- Reading only summaries and skipping the NCERT textbook.
- Memorising answers without understanding the idea.
- Missing formulas, labels, examples, keywords, maps, or formats.
- Writing long answers as one block instead of clear points.
- Not correcting mistakes from previous practice.
Practice Checklist
- Solve two NCERT exercise questions from this chapter.
- Prepare five one-mark facts or definitions.
- Write one three-mark answer in proper format.
- Write one long answer, diagram answer, map answer, grammar answer, or problem solution if the chapter allows it.
- Update your mistake notebook before moving to the next chapter.
Quick Revision Plan
| Time | Task |
|---|---|
| 15 minutes | Read marked NCERT lines |
| 20 minutes | Revise this guide and key points |
| 20 minutes | Solve textbook or sample questions |
| 10 minutes | Correct mistakes and note weak areas |
Exam-Day Recall
Before the exam, revise Factorisation using your marked textbook pages, keyword list, and one solved answer for each major question type. If you can explain the chapter aloud in five minutes, your basics are ready.