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# CBSE - Class 06 - Mathematics - CBSE Revision Notes

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## CBSE Revision Notes for Class 06 Mathematics

Knowing our Numbers
Knowing our Numbers

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Whole Numbers
Whole Numbers
Playing with Numbers
Playing with Numbers
Basic Geometrical Ideas
Basic Geometrical Ideas
Understanding Elementary Shapes
Understanding Elementary Shapes
Integers
Integers
Fractions
Fractions
Decimals
Decimals
Data handling
Data Handling
Mensuration
Mensuration
Algebra
Algebra
Ratio and Proportion
Ratio and Proportion
Symmetry (Deleted)
Symmetry
Practical Geometry (Deleted)
Practical Geometry

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# CBSE Revision Notes for class 6 Mathematics

## CBSE Class 6 Notes and Key Points

• CBSE Revision notes for Class 6 Mathematics PDF
• CBSE Revision notes Class 6 Mathematics – CBSE
• CBSE Revisions notes and Key Points Class 6 Mathematics
• Summary of the NCERT books all chapters in Mathematics class 6
• Short notes for CBSE class 6th Mathematics
• Key notes and chapter summary of Mathematics class 6
• Quick revision notes for CBSE exams

## CBSE Class 6 Mathematics Chapter-wise Revision Notes

• Chapter 1 - Knowing Our Numbers
• Chapter 2 - Whole Numbers
• Chapter 3 - Playing with Numbers
• Chapter 4 - Basic Geometrical Ideas
• Chapter 5 - Understanding Elementary Shapes
• Chapter 6 - Integers
• Chapter 7 - Fractions
• Chapter 8 - Decimals
• Chapter 9 - Data Handling
• Chapter 10 - Mensuration
• Chapter 11 - Algebra
• Chapter 12 - Ratio and Proportion
• Chapter 13 - Symmetry
• Chapter 14 - Practical Geometry

Key Notes for CBSE Board Students for Class 06 Important topics of all subjects are given in these CBSE notes. These notes will provide you overview of the chapter and important points to remember. These are very useful summary notes with neatly explained examples for best revision of the book.

## CBSE Class-06 Revision Notes and Key Points

CBSE class-06  Key points and summary of the lessons is given under this section for Science, Mathematics, Hindi, English, Social Science and other subjects. The notes includes all concepts given in NCERT books and syllabus issued by CBSE for class-06. Key notes are 'to the point' capsules for quick revision of the chapter. We have covered the whole syllabus in these notes.

Revision Notes
CHAPTER – 2
Whole Numbers

• The numbers 1, 2, 3, …… which we use for counting are known as natural numbers.
• If you add 1 to a natural number, we get its successor. If you subtract 1 from a natural number, you get its predecessor.
• Every natural number has a successor. Every natural number except 1 has a predecessor.
• If we add the number zero to the collection of natural numbers, we get the collection of whole numbers. Thus, the numbers 0, 1, 2, 3, ... form the collection of whole numbers.
• Every whole number has a successor. Every whole number except zero has a predecessor.
• All natural numbers are whole numbers, but all whole numbers are not natural numbers.
• We take a line, mark a point on it and label it 0. We then mark out points to the right of 0, at equal intervals. Label them as 1, 2, 3, .... Thus, we have a number line with the whole numbers represented on it. We can easily perform the number operations of addition, subtraction and multiplication on the number line.
• Addition corresponds to moving to the right on the number line, whereas subtraction corresponds to moving to the left. Multiplication corresponds to making jumps of equal distance starting from zero.
•  Adding two whole numbers always gives a whole number. Similarly, multiplying two whole numbers always gives a whole number. We say that whole numbers are closed under addition and also under multiplication. However, whole numbers are not closed under subtraction and under division.
• Division by zero is not defined.
• Zero is the identity for addition of whole numbers. The whole number 1 is the identity for multiplication of whole numbers.
• You can add two whole numbers in any order. You can multiply two whole numbers in any order. We say that addition and multiplication are commutative for whole numbers.
• Addition and multiplication, both, are associative for whole numbers.
• Multiplication is distributive over addition for whole numbers.
• Commutativity, associativity and distributivity properties of whole numbers are useful in simplifying calculations and we use them without being aware of them.
• Patterns with numbers are not only interesting, but are useful especially for verbal calculations and help us to understand properties of numbers better.

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