# CBSE 8 Mathematics | Free Material

• ## Mensuration | Study

Pre-Requisires Test & Enrich Mensuration | Speed Notes Notes For Quick Recap Perimeter: Length of boundary of a simple closed figure. Perimeter of Rectangle = 2(l +b)Perimeter of Square = 4aPerimeter of Parallelogram = 2(sum of two adjacent sides)Area: The measure of region enclosed in a simple closed figure. Area of a trapezium = half…

• ## Understanding Quadrilaterals | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap A quadrilateral has 10 parts – 4 sides, 4 angles and 2 diagonals. Five measurements can determine a quadrilateral uniquely. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Curve: Curve is a figure formed on a plane surface by joining a…

• ## Direct And Inverse Proportions | Study

Pre-Requisires Test & Enrich Direct and Inverse Proportions | Speed Notes Notes For Quick Recap Variations: If the values of two quantities depend on each other in such a way that a change in one causes corresponding change in the other, then the two quantities are said to be in variation. (Scroll down to continue…

• ## Factorisation | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Factorisation: Representation of an algebraic expression as the product of two or more expressions is called factorization. Each such expression is called a factor of the given algebraic expression. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content When we factorise an…

• ## Introduction to Graphs | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Graphical presentation of data is easier to understand. Study Tools Audio, Visual & Digital Content Introduction to Graphs A line graph displays data that changes continuously over periods of time. A line graph which is a whole unbroken line is called a linear graph. For…

• ## Exponents And Powers | Study

Pre-Requisires Test & Enrich Exponents and Powers | Speed Notes Notes For Quick Recap Numbers with exponents obey the following laws of exponents.  Very small numbers can be expressed in standard form using negative exponents. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Use of Exponents to Express Small Number in…

• ## Comparing Quantities | Study

Pre-Requisires Test & Enrich Comparing Quantities | Speed Notes Notes For Quick Recap Ratio: Comparing by division is called ratio. Quantities written in ratio have the sameunit. Ratio has no unit. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Equality of two ratios is called proportion. Product of extremes = Product…

• ## Algebraic Expressions And Identities | Study

Pre-Requisires Test & Enrich Algebraic Expressions and Identities | Speed Notes Notes For Quick Recap Expressions are formed from variables and constants. Constant: A symbol having a fixed numerical value. Example: 2,, 2.1, etc. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Variable: A symbol which takes various numerical values. Example:…

• ## Data Handling | Study

Pre-Requisires Test & Enrich Data Handling | Speed Notes Notes For Quick Recap Data Handling: Deals with the process of collecting data, presenting it and getting result. Data mostly available to us in an unorganised form is called raw data. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Grouped data can…

• ## Squares And Square Roots | Study

Pre-Requisires Test & Enrich Squares and Square Roots | Speed Notes Notes For Quick Recap Square: Number obtained when a number is multiplied by itself. It is the number raised to the power 2. 22 = 2 x 2=4(square of 2 is 4). If a natural number m can be expressed as n2, where n…

• ## Cubes And Cube Roots | Study

Pre-Requisires Test & Enrich Cubes and Cube Root | Speed Notes Notes For Quick Recap Cube number: Number obtained when a number is multiplied by itself three times. 23 = 2 x 2 x 2 = 8, 33 = 3 x 3 x 3=27, etc. Numbers like 1729, 4104, 13832, are known as Hardy –…

• ## Rational Numbers | Study

Pre-Requisires Test & Enrich Rational Numbers | Speed Notes Notes For Quick Recap Rational numbers are closed under the operations of addition, subtraction and multiplication, But not in division. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content The operations addition and multiplication are(i) commutative for rational numbers. (ii) associative for rational…

• ## Linear Equations In One Variable | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap A statement of equality of two algebraic expressions involving one or more variables. Example: x + 2 = 3 Linear Equation in One variable: The expressions which form the equation that contain single variable and the highest power of the variable in the equation is…

• ## Class 8 | Mathematics | All In One

FREE Educational Tools Course Features Personalised Education Pre-Requisites Test & Enrich Study Tools Audio Visual & Digital Content Testing Tools Assign, Assess & Analyse Interactive Tools Ask, Answer & Discuss Speed Notes Notes For Quick Revision E-book Chapterwise Textbook Assignment Tools Testing Tools To Assign, Assess & Analyse NCERT Solutions Solved Exercises NCERT Exemplar HOTS…

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