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Natural Numbers and Whole Numbers

ICSE · Class 6 · Mathematics

Quick revision notes for Natural Numbers and Whole Numbers — ICSE Class 6 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

91 questions25 flashcards5 concepts

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Key Topics to Revise

1

Natural Numbers

  • Natural numbers are the numbers we use for counting: 1, 2, 3, 4, ...
  • The smallest natural number is 1.
  • There is no largest natural number — they go on infinitely.
2

Whole Numbers

  • Whole numbers are natural numbers along with zero: 0, 1, 2, 3, 4, ...
  • The smallest whole number is 0.
  • There is no largest whole number — they are infinite.
3

Successor and Predecessor

  • Successor of a number is the number that comes just after it. It is obtained by adding 1.
  • Predecessor of a number is the number that comes just before it. It is obtained by subtracting 1.
  • The predecessor of 1 is 0, which is not a natural number.
4

Properties of Whole Numbers

  • Whole numbers follow certain rules under addition and multiplication.
  • Closure Property: Sum or product of two whole numbers is always a whole number.
  • Commutative Property: a + b = b + a and a × b = b × a

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Full Notes

Key Concepts

Natural numbers are the counting numbersWhole numbers include all natural numbersThe successor of a numberWhole numbers follow specific rules whenA number line is a straight

Frequently Asked Questions

What are the important topics in Natural Numbers and Whole Numbers for ICSE Class 6 Mathematics?
Key topics in Natural Numbers and Whole Numbers include Natural Numbers and Whole Numbers — Complete Overview, Natural Numbers and Whole Numbers - Complete Concept Overview, Mind map showing the definition, examples, and what is NOT a natural number. These are the concepts ICSE Class 6 examiners draw on most — study them first, then practise related questions.
How to score full marks in Natural Numbers and Whole Numbers — ICSE Class 6 Mathematics?
Understand the core concepts first, then work through the 91 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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