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Mathematics · Class 9Number SystemsVideo coming soonRead the notes instead
Free notes for this chapterMark as Completed
Rational and Irrational Numbers, Decimal Expansions, Operations on Real Numbers and the board questions built on them — roughly 6 marks of the paper.
What this chapter covers
- 1Rational and Irrational Numbers
- 2Decimal Expansions
- 3Operations on Real Numbers
- 4Laws of Exponents
These lessons are being recorded. The written notes for this chapter are free to download now.
Learning resources
Seedha Notes
Chapter notes withimportant points,examples & format
View Notes for Number Systems, MathematicsPractice Questions
Important questions,board questions,numericals
Practice Now for Number Systems, MathematicsPrevious yearquestions withfull solutions
View PYQs for Number Systems, MathematicsSample Paper
Board patternsample paper withmarking scheme
Open Paper for Number Systems, Mathematics
In the notes
Topics covered
- 01Rational and Irrational Numbers18:55
- 02Decimal Expansions15:45
- 03Operations on Real Numbers18:16
- 04Laws of Exponents28:12
After this chapter you can
- Explain rational and irrational numbers without reading from the book
- Present decimal expansions in the format the marking scheme rewards
- Attempt every previous year question set on this chapter
- Marks
- 6
- PYQs
- 16
- Video
- 1h 21m
Then do the work
- One-shot revision, 20 minutes
- Formula sheet for this chapter
- Printable summary, 2 pages
Prepare
| Year | Asked as | Marks |
|---|---|---|
| 2025 | Short answer | 4 |
| 2024 | Long answer | 2 |
| 2023 | MCQ set | 4 |
| 2022 | Case based | 2 |
| 2021 | Short answer | 6 |
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