Home > CBSE CLASS 8

# CBSE CLASS 8

### 1. RATIONAL NUMBERS

1.1 Definition of Rational Numbers

1.2 Types of Rational Numbers

1.3 Decimal Representation of Rational Numbers

1.4 Comparison of Rational Numbers

1.5 Representation of Rational Numbers on Number Lines

1.7 Properties of Addition of Rational Numbers

1.8 Subtraction of Rational Numbers

1.9 Properties of Subtraction of Rational Numbers

1.10 Multiplication of Rational Numbers

1.11 Properties of Multiplication of Rational Numbers

1.12 Division of Rational Numbers

1.13 Properties of Division of Rational Numbers

1.14 Finding more than one Rational Number between two Rational Numbers

1.15 Rational Number Notes and Sample Questions in PDF Format

2. EXPONENTS

2.1 Definition of Exponent/Power/Index

2.2 Positive Integral Exponent of Rational Number

2.3 Negative Integral Exponent of Rational Number

2.4 Laws of Exponents

2.5 Numbers in Standard Form

2.6 Exponents Notes and Sample Questions in PDF Format

3. SQUARES AND SQUARE ROOTS

3.1 Perfect Squares or Squares Numbers

3.2 Properties of Perfect Squares

3.3 Short Cut Method for Finding Squares

3.4 Square Root of Perfect Square Numbers By Long Division Method

3.5 Square Root of Decimal Numbers

3.6 Square Root of Fraction

3.7 Some Important Pattern of Square Numbers

3.8 Square and Square Roots Notes and Sample Questions in PDF Format

4. CUBES AND CUE ROOTS

4.1 Perfect Cubes of Cube of a Number

4.2 Cube of Positive and Negative Numbers

4.3 Properties of Cubes of Number

4.4 Short Cut Method for Finding Cubes of Number

5. PLAYING WITH NUMBERS

5.1 Two and Three Digit Numbers

5.2 Test of Divisibility

5.3 Replacing Alphabets by a Number

6. OPERATION ON ALGEBRAIC EXPRESSION

6.2 Subtraction of Algebraic Expression

6.3 Multiplication of Algebraic Expression

6.4 Division of Algebraic Expression

6.5 Algebraic Identities

7. FACTORIZATION

7.1 Factors and Factorization

7.2 Factorization By Taking a Common Monomial Factor from Each Term

7.3 Factorization By Taking a Common Binomial Factor from Each Term

7.4 Factorization By Grouping

7.5 Factorization By Using (a2 – b2) = (a+b)(a-b)

7.6 Factorization By Using a2 + b2 + 2ab = (a + b)2

7.6 Factorization By Using a2 + b2 – 2ab = (a – b)2

7.7 Factorization of Quadratic Polynomial of the Form (x2 + px + q)

7.8 Factorization of Quadratic Polynomial of the Form (ax2 + bx + c)

8. LINEAR EQUATION IN ONE VARIABLE

8.1 Definition of Linear Equation in One Variable

8.2 Rules for Solving a Linear Equation

8.3 Application of Linear Equation

9. PERCENTAGE

9.1 Definition of Percentage

9.2 Conversion of Percentage into Fraction

9.3 Conversion of Fraction into Percentage

9.4 Finding Percentage of a number

9.5 Application of Percentage

10. PROFIT AND LOSS

10.1 Definition of Cost Price, Selling Price, Profit and Loss

10.2 Formula based on Profit and Loss

10.3 Application of Profit and Loss

10.4 Definition of Discount, Marked Price, List Price, Successive Discount

10.5 Formula for Discount

10.6 Application of Discount

11. COMPOUND INTEREST

11.1 Definition of Compound Interest (CI)

11.2 Finding CI When Interest is Compounded Annually

11.3 Finding CI When Interest is Compounded Half-Yearly

11.4 Formula for CI When Interest is Compounded Annually

11.5 Formula for CI When Interest is Compounded Annually But Rates are Different for Different Years

11.6 Formula for CI When Interest is Compounded Annually But Time is in Fraction

11.7 Application of Compounded Interest Formula

12. DIRECT AND INVERSE PROPORTIONS

12.1 Definition of Direct Proportion

12.3 Definition of Inverse Proportion

13. TIME AND WORK

13.1 General Rules for Time and Work

13.2 Problems on Time and Work

13.3 Problem on Pipes and Cistern

14. POLYGON

14.1 Definition of Curve, Open Curve, Closed Curve

14.2 Definition of Polygon, Concave and Convex, Regular and Irregular Polygon

14.3 Formula for Regular Polygon

14.4 Formula for Convex Polygon

14.5 Number of Diagonals in a Polygon

14.6 Definition of Triangle and its types

14.7 Definition of Quadrilateral and its types

15.1 Definition of  Quadrilateral and its terminologies

15.2 Angle Sum Property in Quadrilateral

16. PARALLELOGRAM

16.1 Definition of Parallelogram and its properties

16.2 Definition of Rhombus and its properties

16.3 Definition of Rectangle and its properties

16.4 Definition of Square and its properties

16.5 Definition of Trapezium and its properties

16.6 Definition of Isosceles Trapezium and its properties

17. AREA OF TRAPEZIUM AND A POLYGON

17.1 Formula for Finding Area of Trapezium

17.3 Area of Irregular Polygon

17.4 Area of Regular Polygon

18. THREE-DIMENSIONAL FIGURES

18.1 Definition of 3D Figures, Faces, Vertex, Edge

18.2 Definition of Cuboid and its Number of Faces, Vertices, Edges

18.3 Definition of Cube and its Number of Faces, Vertices, Edges

18.4 Definition of Prism and its Number of Faces, Vertices, Edges

18.5 Definition of Pyramid and its Number of Faces, Vertices, Edges

18.6 Euler’s Formula for 3D Figures

19. VOLUMES AND SURFACE AREA OF SOLIDS

19.1 Volume and Surface Area Formula for Cuboid

19.2 Volume and Surface Area Formula for Cube

19.3 Volume and Surface Area Formula for Right Circular Cylinder

19.4 Volume and Surface Area Formula for Right Circular Cone

19.1 Volume and Surface Area Formula for Spheres

20. DATA HANDLING

20.1 Definition of Data, Raw Data, Range, Statistics

20.2 Frequency Distribution and Tally Mark

20.3 Grouping of Data

21. CONSTRUCTION AND INTERPRETING BAR GRAPH

21.1 Definition of Bar Graph

21.2 Steps to Draw Bar Graph

22. PIE CHART

22.1 Definition Pie Chart

22.2 Central Angle Formula for Component in Pie Chart

22.3 Steps to create Pie Chart

23. PROBABILITY

23.1 Definition of Probability and its terminologies

23.2 Some Experiments and Their Outcomes

23.3 Introduction of Playing Cards

23.3 Formula for Finding Probability

24. GRAPHS

24.1 Introduction of Graphs and its terminologies