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Numbers in Indian and International System

ICSE · Class 6 · Mathematics

Quick revision notes for Numbers in Indian and International System — ICSE Class 6 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

97 questions30 flashcards5 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 Mind map showing the relationship between numerals, numeration, and digits, Flowchart showing the four periods of Indian System and their place values, Flowchart showing the step-by-step process of grouping and reading numbers in Indian System. These are the concepts ICSE Class 6 examiners draw on most — study them first, then practise related questions.
How to score full marks in Numbers in Indian and International System — ICSE Class 6 Mathematics?
Understand the core concepts first, then work through the 97 practice questions available for this chapter. Revise formulas and 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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