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Syllabus

Indian Number System — Syllabus

ICSE · Class 5 · Mathematics

What Indian Number System covers in ICSE Class 5 Mathematics: 4 topics, for the 2026-27 session. Part of the ICSE Class 5 Mathematics syllabus.

39 questions25 flashcards6 formulas & key relations5 concepts

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4 Topics · ICSE Class 5 Mathematics · 2026-27

Topics in Indian Number System

1

Understanding Large Numbers

  • The Indian Number System uses commas (or spaces) to separate numbers into periods: Ones, Thousands, Lakhs, and Crores.
  • 10 ten lakhs = 1 crore = 1,00,00,000
  • 1 crore is the smallest 8-digit number.
2

Place Value and Expanded Form

  • Each digit in a number has a place value based on its position.
  • The place value chart includes: Ones, Tens, Hundreds, Thousands, Ten Thousands, Lakhs, Ten Lakhs, Crores, Ten Crores.
  • To find the place value, multiply the digit by the value of its position.
3

Successor and Predecessor

  • Successor of a number is the number that comes just after it (add 1).
  • Predecessor of a number is the number that comes just before it (subtract 1).
  • For large numbers, adding or subtracting 1 may change multiple digits (e.g., 9,99,99,999 + 1 = 10,00,00,000).
4

Comparing and Ordering Numbers

  • Rule 1: A number with more digits is greater.
  • Rule 2: If numbers have the same digits, compare from left to right.
  • Ascending order: Smallest to largest.

Key Concepts

Central concept: Indian Number System

Place Value ChartReading and Writing Large NumbersExpanded and Compact FormSuccessor and PredecessorComparison of NumbersAscending and Descending OrderFormation of Numbers with Given Digits

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Frequently Asked Questions

What are the important topics in Indian Number System for ICSE Class 5 Mathematics?
Key topics in Indian Number System include Understanding Large Numbers, Place Value and Expanded Form, Successor and Predecessor, Comparing and Ordering Numbers. Study these first, then practise questions on each for Class 5 exams.
How should I revise Indian Number System for Class 5 exams?
Learn the core ideas first, then work through the 39 practice questions on Indian Number 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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All ICSE Class 5 Mathematics Syllabus

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