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Numbers in Indian and International System — Revision Notes

ICSE · Class 6 · Mathematics

Numbers in Indian and International System revision notes for ICSE Class 6 Mathematics: 3 topics in quick points.

97 questions30 flashcards7 formulas & key relations5 concepts

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Key Topics to Revise

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1. Indian System of Numeration

  • Used commonly in India and neighboring countries.
  • Periods: Ones, Thousands, Lakhs, Crores.
  • Commas are placed after every 3 digits from the right, then every 2 digits: e.g., 1,00,000 (One lakh).
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2. International System of Numeration

  • Used globally in countries like the USA, UK, and in international reports.
  • Periods: Ones, Thousands, Millions, Billions.
  • Commas are placed after every 3 digits from the right: e.g., 1,000,000 (One million).
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3. Comparison of Indian and International Systems

  • Both systems use digits 0–9 but differ in grouping and naming.
  • Indian system uses Lakhs and Crores; International uses Millions and Billions.
  • 1 Lakh = 100,000 = 100 thousand.

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Full Notes

Key Concepts

A numeral is the symbol usedIn this systemThis system uses periods like 'Ones'Each digit in a number has1 lakh = 100

Frequently Asked Questions

What are the important topics in Numbers in Indian and International System for ICSE Class 6 Mathematics?
Key topics in Numbers in Indian and International System include Indian System of Numeration, International System of Numeration, Comparison of Indian and International Systems. Study these first, then practise questions on each for Class 6 exams.
How should I revise Numbers in Indian and International System for Class 6 exams?
Learn the core ideas first, then work through the 97 practice questions on Numbers in Indian and International System. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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