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Revision Notes

Numbers

ICSE · Class 3 · Mathematics

Quick revision notes for Numbers — ICSE Class 3 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

42 questions30 flashcards5 concepts

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Key Topics to Revise

1

Place Value and Face Value

  • Each digit in a number has a place value based on its position.
  • The places from right to left are: Ones (O), Tens (T), Hundreds (H), Thousands (Th), and Ten Thousands (TTh).
  • Place value = digit × value of its place (e.g., 5 in hundreds place = 5 × 100 = 500).
2

Expanded and Compact Form

  • Expanded form means writing a number as the sum of the place values of its digits.
  • Compact form (or standard form) is the usual way of writing a number.
  • If a place has 0, we skip it in expanded form (e.g., 2047 = 2000 + 40 + 7).
3

Comparing and Arranging Numbers

  • To compare two numbers, start from the leftmost digit (highest place).
  • If digits are the same, move to the next place on the right.
  • Ascending order = smallest to greatest.
4

Forming Greatest and Smallest Numbers

  • To form the greatest number: arrange digits in descending order.
  • To form the smallest number: arrange digits in ascending order.
  • If 0 is one of the digits, it cannot be placed at the beginning (leftmost).

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Full Notes

Key Concepts

The value of a digit basedThe face value of a digitWriting a number as the sumThe standard way of writingArranging numbers from smallest to greatest

Frequently Asked Questions

What are the important topics in Numbers for ICSE Class 3 Mathematics?
Key topics in Numbers include Shows all one-digit numbers from 0 to 9, with 0 as the smallest and 9 as the largest, Illustrates the range and boundaries of two-digit numbers, Shows the structure of three-digit numbers with their three places. These are the concepts ICSE Class 3 examiners draw on most — study them first, then practise related questions.
How to score full marks in Numbers — ICSE Class 3 Mathematics?
Understand the core concepts first, then work through the 42 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.

More resources for Numbers

All 11 chapters — ICSE Class 3 Mathematics Revision Notes

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